By Hillary Busis
October 24, 2012 at 02:07 PM EDT

Theory: Tom Hanks’ new mustache is actually an alien parasite, and it’s been controlling the Oscar winner’s brain since it settled above his upper lip sometime in September. Luckily, the ‘stache has an awesome sense of humor — which explains why Hanks has been so fun lately.

Judging by Hanks’ appearance on Late Night with Jimmy Fallon yesterday, the farcical facial hair shows no signs of toning down the silliness. ‘Stache prompted the Cloud Atlas star to share some Full House-inspired slam poetry with Fallon’s audience. Each character’s catchphrase makes an appearance, as do The Beach Boys. And for some reason, part of it is performed in Hanks’ best Bane voice. Want to watch? You got it, dude:

What will Tom Hanks’ mustache do next??

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