People who don't say thank you when you open the door for them.
Drivers that don't thank you for letting them go first on a tight road.
People that don't respond when you talk to them.
The term "customers are always right".
Bad customer service! (If they hate the job so much, go get another one).
Traffic jams.
Finishing at the wrong scene whilst masterbating to porn.
I better stop before I get carried away! Lol