Spotted on Colossal, probably the best bit of origami* ever.
*Well, almost: “completely from paper (with minor bits of scotch tape to prevent friction).” And that’s good enough for me.

“Engineer Aliaksei Zholner demonstrates a minuscule V8 engine he designed that is built (from paper). The engine is so tiny it fits inside the plastic container found inside a Kinder egg.”

It really is quite amazing. Here’s the link to the video, plus the other bits he’s made.