Irrational things that annoy you (and non irrational things too come to think of it)

[Desmo]

Tell me about it. The amount of times I go past someone on the motorway only to find that a few seconds later they want to come back past again and then sit in front of me is ridiculous. Thing is, I'm usually using cruise control so I know my speed hasn't changed at all yet they get in front and then slow back down meaning I now have to pass again