Getting into an elevator with someone who just smoked a cigarette (or pipe, or cigar, or any other smokeable substance).
Having a piece of food - particularly a hard piece of food - stuck on your tonsils and the back of your tongue keeps bumping up against it.
Your passenger's left leg when you put your manual car in fifth.
Being stuck behind a slow walker on the streets of New York (and the people coming from the other direction are moving too fast to allow you to go around the slowpoke).
The slow walker above is smoking a cigarette.
Donald Trump's ugly face everywhere I look.
The crying baby in the apartment upstairs.
People who hold the elevator forever at their floor.
People who won't re-rack weights at the gym.
Bent bra hooks.