Painlevé Paradox

because I'm not 100% sure this is a proper example of it.

Long story short, in certain types of physics engines there exists a glitch, where a rigid object sliding over a rough surface may suddenly "go flying". As you can see, the Rigid rod slides down a ramp made of Wall. Rather than sliding smoothly down as one would expect, it hops and jumps, quite a bit that one time in the middle.