Once a dropped a piece of chalk while writing on a blackboard and it landed on its vertical axis. Basically statistically impossible -- like flipping a coin and having it come up 'other.'

I also have a superpower where I think of quotes or notable events or scenes from an episode of a TV show, and that episode will play within a day or two. When it happens it never fails, sort of like my ability to change red lights into green lights just by staring at them.