Live freefroll tournament. Guess it's a mix of bad to good players (no read on any yet). Blinds are 100-200, and everybody have around 5500-6500 chips (I still have 6000 and haven't played a hand yet).

EP2, MP2 and SB limps in, and I check in the BB with Ac2c.

Flop is JJ8, two clubs. Everybody checks.

Turn is Ah. SB checks, I bet 500. EP2 and MP2 folds. SB raises to 1500. I call.

River is Qs. SB bets 1500.

What's his hand, and do I call?