i dont understand the flop bet. It cant be for value as you are most likely behind, nor will it drive anyone out of this large pot.

If a late position player bets I would consider raising but would probably fold. Someone has for sure cought something in this co-ordinated flop...

Your hand is weak and the only way to improve it (and still be ahead) is most likely by catching a Q. check/folding bettern than check/raising better than betting