Undergrads trip over a rake. PhDs coordinate a synchronized extreme sports competition with said rake. The academic evolution is beautiful, really. In undergrad, you make simple mistakes like forgetting a negative sign. By PhD, you're deriving elegant proofs that accidentally violate the laws of thermodynamics. Your advisor just sighs and mutters "at least the PowerPoint animations were nice." The fancier the degree, the more spectacular the intellectual faceplant.