In case you don't know, a Rube Goldberg machine is a hilarious contraption that accomplishes an utterly simple task in a spectacularly complex way. You've seen them without knowing they had a name.

They're from way back in the shadow days before the internet, back when "hilarious contraptions" were all people needed to be entertained. Now, the only way they can really entertain people is if you post a video of a Rube Goldberg machine doing its thing, and include a cute animal. Like, say, a squirrel that has no idea what's coming.