December 10, 2015 2:18 AM EST

Amy Poehler stopped by the Tonight Show on Wednesday to chat with host Jimmy Fallon and promote her upcoming film Sisters, only to be challenged to one of his most popular games — Truth or Truth.

The game, as it often does, provoked hilarious responses from both Fallon and Poehler to questions like “What’s your biggest fear?” and “What does your real voice sound like?” So funny, in fact, that both of them had as much trouble keeping a straight face as the audience did.

It also involved Fallon pulling something unexpected out of his pocket, but you’ll have to watch the video to see what it was.

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Write to Rishi Iyengar at rishi.iyengar@timeasia.com.

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