WATCH: Jimmy Fallon Impersonates Bill Cosby on ‘The Tonight Show’

We’ve all done Bill Cosby impersonations … but never right in front of him. Last night on The Tonight Show, Jimmy Fallon stared the legend right in the face, slowed his voice and began to act just like Cosby. In classic Cosby fashion, Bill Cosby appeared unimpressed with Fallon’s antics. Have a look at the hilarious clip.