you won't make yourself a name if you follow the rules

Help me think of impossible things? 'When hell freezes over', 'when pigs fly', 'when this [gerrymandered all to hell, very safe Democratic] district elects a Republican', that sort of thing. Nothing quoted from "Scarborough Fair".

Thanks!

ETA for clarification: I want, like in Scarborough Fair, tasks that someone could hypothetically do except for the fact that they're logically impossible.