Pictionary! It’s one of the few games that Jimmy Fallon makes his ‘Tonight Show‘ guests play that hasn’t been totally twisted from its original form. It’s a classic. But it’s also an interesting way to gain keen insight into the way various people operate, even away from the game-playing stage of Fallon’s late show.

It’s a psychological test. With, uh, guessing elements.

Last night’s entry into the Pictionary lexicon was one of its most fascinating yet, featuring Fallon and sidekick Steve Higgins joining forces with J.K. Simmons and Lena Dunham, respectively. Dunham is a cheery, encouraging competitor, one who roots even for the opposite team. Simmons is, well, not.

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