10 Horror Movies Where Pranks Brutally Backfired

10. Friday The 13th Part 3 (1982)

Jason Voorhees, the antagonist of almost a dozen Friday the 13th films, is a cultural icon. Part of his appeal is a now legendary piece of his look, a white hockey mask with red triangles. Funny thing is, the mask was an accident born out of a cinematic shortcut.

Filming a movie is grueling at the best of times, and it can only be imagined movies with heavy makeup and gore effects are even worse. During lighting tests one night, it was decided to just plop a goalie mask on the actor playing Jason instead of doing his makeup. A few tweaks to the mask, and out of necessity was born a legend.

But how to work this great prop into the film? It was decided that character Shelly was to be a prankster, constantly annoying the other characters. At one point, he pops out of the water wearing the mask, scaring another character and ending up alone and sad. After Shelly makes a poorly timed trip to Jason's hiding spot, the hulking killer becomes the proud new owner of an iconic costume.

With this act of prankery, Shelly inadvertently added the final piece to one of cinema's most infamous killers. The mask made Jason an unreadable, emotionless monster, adding tremendously to his character and mystique and making him one of the most popular movie characters of the '80s.