Quote Originally Posted by Iwind
I think he'd wait till the river with making the raise then. He might have put me on a flush draw after all, and then he'd want me to catch the flush and then take my stack.
Most big winners like to get money into the pot with the best hand before the river. A flush draw will always pay-off on the turn, but only sometimes on the river.

It looks to me like he wants to get in all of the money and/or is attacking your weak turn bet.