Johnstone pulled off a number of infamous
pranks during his playing days, including placing a soggy brownie inside
Steve Garvey's
first base mitt, setting teammates'
cleats on fire (known as "hot-footing"), cutting out the crotch area of
Rick Sutcliffe's underwear, and locking Dodger
manager Tommy Lasorda in his office during spring training. Johnstone also nailed teammates' spikes to the floor, and once replaced the celebrity photos in manager Lasorda's office with pictures of himself, Reuss, and
Don Stanhouse. In a 1981 game against Pittsburgh, Johnstone and teammate
Jerry Reuss dressed up as
groundskeepers to drag the
Dodger Stadium infield in the fifth inning of a game. Afterwards, Lasorda yelled at them and sent Johnstone to pinch-hit the next inning as a punishment; however, Johnstone ended up hitting a home run. ==Journalism career==