Last night on The Tonight ShowSNL cast member Kate McKinnon and actor Josh Brolin joined master impressionist Jimmy Fallon to play "Impressions on Demand." The game consisted of picking celebrities at random and doing an impression of them, whether they wanted to or not. Jimmy was a little afraid to make fun of boxer Mike Tyson, which makes sense considering he's terrifying. 

Fallon hung in there and pulled off a great falsetto Tyson, Kate nailed Christopher Walken, and Josh Brolin, well he tried his darnedest.