Is it just me but why do I always seem to get the dumbass in front of me in queues such as ATMs, the supermarket, post office, bank etc

You know the feeling you're at the ATM and there's one person in front of you and then the bugger pulls out four or five cards or you're in the supermarket queue and the fool in front of you is counting out €19.99 in loose change and is a penny short and then pulls out the €20 note......