This is going to make me sound like a grouchy old woman at the ripe age of 30 .
(I am by no means calling 30 old, that would be obnoxious, and worthy of a pet peeve of it's own.)
Snarky teenagers/college kids annoy me.
I was in the self checkout line at the grocery store ringing myself up when some college kids got behind me. I had items that I had to enter codes in and I guess they decided I was taking too long. After waiting less than 30 seconds for me to finish up, they snorted, rolled their eyes at me and got in another line.
It was so nice to finish up 30 seconds later and walk past the two of them stuck in their line. They had to have a clerk help them use the self check out.