I have AA, flop comes A 10 4...Player bets big, I reraise him, he goes all in with A4 and he gets running fours for quads...not sure what the odds were but had to be ridiculous.
That is a rough beat, I had one of those myself I calculated it to be 1250:1 chance of runner runner quads. If someone else is better at probablities than I am I'd like to know how exact I am.