Alan Rickman has one of the most distinguished voices in show biz. If you've ever wondered what the guy sounds like when he inhales a bunch of helium, wonder no more.

Last night on The Tonight Show Starring Jimmy Fallon, Rickman confronted Fallon about his Rickman-off with Benedict Cumberbatch from a few years ago, when they impersonated Rickman reading rap lyrics. If you haven't seen it, you must. This is what they're talking about:

So on last night's episode, Rickman, like a true British gentleman, brought two helium balloons – one for him and one for Fallon. They conducted the rest of the interview in chipmunk voices and it was so funny yet so adorable. Check out these two goofing off: