BB AA JJ

Just what you want to see when you're a short stack and in the BB with blinds at 1000/2000 and 300antes is a big bet in front of you when you have AA.

Yep, a player gets this and undershoves (moving all in for less than the existing bet) with AA, and sees he is up against JJ, so we have

BB w AA v JJ

Eeeew, that's a J on the flop, nothing comes to help out the undershove and HeGone in 89th place.