[Jamsym]

Just to post my reasons for the bet/call:

Let him make the tough choice. If you bet 3/4 pot here he's commited to his whole stack if he wants to continue. Put him to this choice.

If he has 22-99 it can look like a good flop for him, paired board and a flush draw, he must feel he has a good chance at being ahead.

Also it's better to be aggressive because next time you 3 bet and miss the flop you want your c-bet to work.