One classic hack occurred on May 9, 1994, involving a police car with its flashing warning lights operating. The unusual aspect of this hack was its position—on top of MIT's Great Dome. The car was found to be a gutted, junked, heavy
Chevrolet Cavalier, painted meticulously to match the MIT Campus Police patrol cars. The car's number was
pi. Its license plate read "
IHTFP", the abbreviation for MIT's unofficial slogan. A dummy dressed as a campus patrolman was seated inside with mug of coffee and a box of donuts. Some years later, the police car has now been semi-permanently re-installed in the
Stata Center as an all-time classic. One such notable hack attempt targeting the 1948 Harvard–Yale football game involved the use of
primer cord. One night shortly before the game MIT students snuck into the Harvard stadium and buried primer cord just under the field. The plan was to burn the letters MIT into the middle of the field during the game. However, their work was uncovered by groundskeepers and disabled. During the game the hackers were apprehended while wearing heavy coats on a fair-weather day. The coats were lined with batteries, obviously intended to be used to detonate the primer cord. An apocryphal story is that an MIT dean came to their defense, opening his own battery-lined coat and claiming that "all Tech men carry batteries"; an MIT dean did show up, but he was not wearing batteries. This phrase has since become common among MIT students. The Harvard-Yale football game was again the target of MIT hackers in 1982 when a large weather balloon painted with "MIT" all around was inflated, seemingly from nowhere, in the middle of the field. The next day the
Boston Herald ran the headline "MIT 1—Harvard–Yale 0: Tech Pranksters Steal the Show". The 1982 Harvard–Yale hack earned acclaim as winner of "Hack Madness", a
March Madness-themed contest sponsored by the MIT Alumni Association in 2014 to determine "the greatest MIT hack of all time". In 1990 an MIT banner was successfully launched from an end zone using a model rocket engine shortly before Yale attempted a field goal kick. In 1996, the Harvard logos on the scoreboard were hacked from
VE-RI-TAS to read
HU-GE-EGO instead. Another traditional hacking target has been the bronze
statue of John Harvard, the namesake of
Harvard University. The statue itself was sculpted by
Daniel Chester French, a respected artist who studied at MIT, who is best known for his
statue of Abraham Lincoln at the
Lincoln Memorial in
Washington, DC. Because of its visible location in
Harvard Yard and its symbolic significance, the John Harvard statue has been fitted with an unending sequence of "
accessories". MIT hackers are hardly alone;
Dartmouth College pranksters like to paint the statue green,
Yale pranksters prefer blue, and others have dressed the statue in women's underwear. MIT hackers like to go a few steps further, fitting the statue with a plaster leg cast after a crushing football defeat, and disguising the statue as the
Unabomber after that infamous Harvard alumnus was arrested. John Harvard has worn a
Brass Rat from time to time, and has donned a Halo combat helmet and brandished a Halo assault rifle to mark the release of the
Halo 3 first-person shooter video game. In accordance with hacker ethics, great care is taken to ensure that the hacks can be removed without causing permanent damage to Harvard's treasured symbol. The cleverness of many MIT hacks has even resulted in
urban legends about supposed hacks that may not have occurred. One rumored hack involved a certain student's adherence to
classical conditioning behavior response, as studied by Harvard Professor
B. F. Skinner. Throughout the off-season, this supposed student visited the Harvard football stadium during his lunch break. He dressed in a black and white striped shirt and trousers, filled his pockets with bird-seed, then went on the field, blew a whistle, and spread his birdseed on the field. The result of all of this effort, the story goes, is that on opening day as the Harvard football team took the field to face their opponent, the referee blew his whistle to signal the start of the game, and the field was suddenly inundated by a flock of birds looking for their lunch. Despite sounding like a classic MIT hack, this particular prank has never been verified. The author of a 1990 book about pranks pulled by MIT students stated that he had not come across clear documentation of this tale during his years of research. On the other hand, at least one hack involved a staged event that never occurred, when hackers convinced major news media that they had created an indoor snowstorm in Baker House dormitory. When MIT replaced older
mercury-vapor lamps with high-efficiency
LED lamps to illuminate the Great Dome, hackers started changing the color of the lights to reflect various occasions—
Earth Day, the
Fourth of July, etc. Although reprogramming the lights is technically straightforward, these Great Dome lighting hacks are very visible from Boston's
Back Bay district, across the
Charles River. In September 2011, hackers installed 153 (= 9 × 17) custom-made wirelessly-controlled color-changing high-power
LED lights into every window above the first floor of the tall MIT
Green Building. They displayed a waving
American flag throughout the evening of September 11, 2011 in remembrance of the
September 11 attacks of 2001. For a short time in the early morning of September 12, the lights displayed a
Tetris game, thus realizing a long-standing hack proposal, the "
Holy Grail" of hacks. The display hardware had occasional glitches, and was removed as of September 13. The hardware and software designs were further developed and refined for better reliability. On April 20, 2012, MIT hackers successfully turned the Green Building into a huge playable Tetris game, operated from a wireless control podium at a comfortable viewing distance in front of the building. Visitors to Campus Preview Weekend (a gathering for admitted prospective freshman students) were invited to play the game on the colossal display grid, which was claimed to be the second-largest full-color video display in the US. Instead of a one-shot temporary installation, the hackers have designed and built a permanent facility that can be re-used repeatedly by the MIT community. An understanding has been reached with the EAPS Department, which is headquartered in the Green Building, to allow the light display hardware to remain installed in each window. To avoid annoying the occupants and to allow late-working staff to "opt out", each light display is equipped with a manual override button, which will disable the
pixel lighting for that window for several hours after it is pressed. In addition, the hackers have released
open-source software tools used to develop new display patterns, so that others can design and deploy new stationary or animated images, in cooperation with the hacker engineers. ==Protest hacks==