One of his jokes gave a man a three-month hospital stay.
A newsman and cruel joker named Halloran plays a deceptive gag on a down-and-out barfly named Johnny in this worthwhile and ironic 1957 TV episode, a morality lesson on practical jokes.
Alfred Hitchcock Presents - The Night the World Ended
It's also on Netflix streaming.
(And in the useless trivia department, look for one of the street kids who is played by Harry Shearer of The Simpsons voice actor fame.)