1) You know when you (females usually) are really tired, stressed and having a bad or really rushed day and guys get fresh with you. Vexation is not fun. I absolutely detest. I don't like being teased, pestered, coaxed, etc. at all period but when guys do it when we womenfolk are truly not in the mood, it annoys to an extent you'd never know.
2) You know when you're almost done getting over some thought, some place, something or someone and that thought, place, thing or person come back into your life. Causes immense disturbance. Immense.
3) Smelly public restrooms. Who tinkles all over the seat? Who doesn't flush? Whose pee smells that much?