This brings up a couple of other situations that are similar.
#1 People who go through the drive through at any restaurant and can't figure out what they want.
#2 People who go through the drive through and order 10 different meals for their office mates, stopping the line for 10 minutes.
#3 People waiting in any cashier line who, upon reaching the cashier, have to start digging through their shit (this is usually a female) to find their money and their coupons / store card. You've been in line how long, and can't get your shit out in advance?
#4 People (usually younger folks) who pick up some stuff at a gas station and are paying in coins - then don't have enough.
#5 People who get an item up to the cashier at a supermarket with a cart full of stuff and then want to argue about how their $2 was tagged $1.89 and rang up wrong. There are 10 people behind you. If you really want to bitch, DON'T buy the item. Jesus.
I hate people.