Alan Rickman has quite the deep, recognisable voice, but when he stopped by The Tonight Show on Thursday, he inhaled some helium and sounded nothing like himself. He and Jimmy Fallon hilariously took turns breathing in helium from giant balloons, and Jimmy took the opportunity to have Alan talk about his role as Severus Snape in the Harry Potter series. Alan couldn't help but laugh as he did, with Jimmy cracking up alongside him. Watch the funny clip above, then check out more viral videos, including Jimmy and Lena Dunham's recent lip-sync battle.
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