Benedict Cumberbatch may know how to impersonate a handful of celebrities in less than a minute, but now he’s tackling a whole new game.

While appearing on “The Tonight Show” Monday night, host Jimmy Fallon challenged the “Imitation Game” star to a few rounds of “Three-Word Stories.” Fallon and Cumberbatch took turns trying to guess one another’s mystery words, but here’s the catch — the players can only utter three words at a time.

Fallon didn’t have much trouble getting Cumberbatch to utter “unicorn,” though the “Doctor Strange” front-runner ran into a bit of a snag trying to get Fallon to say “booty.”

Check out the hilarious clip.