Matt Damon: 'SNL' Digital Short with Katy Perry!
Midway through the short, the trio runs into Val Kilmer, whose character enjoys huffing gas fumes and runs a science lab with a time machine.
Things go downhill at the end when the gang decides to play a game of Russian Roulette – yikes!
Pictured inside is Matt leaving his hotel in NYC on Friday (December 9).
SNL Digital Short – Best Friends