 It s time for another annual M*A*S*H prankathon. B.J. starts by nailing Hawkeye s shoes to the floor so when trying to put them on, Pierce takes a header. He felt that to be a stupid, childish prank. At dinner, B.J. swears he will pull the ultimate prank on everybody. Hawkeye wasn t afraid, until menial practical jokes happen to everybody around him: Father Mulcahy s food had been spiked, Klinger s file explodes, Charles finds a snake in his bed, the back of Margaret s robe had been cut out, and something other than toothpaste was occupying Colonel Potter s toothpaste tube. Hawkeye fears he has become a marked man for a prank even bigger than those what befell his friends. When and where will it happen? Or...Has it already happened?