Yeah I agree with the others about the flop Guy, you should definitely be betting somewhere close to 80% pot I think, to get value from
Xx and Ax Xc, but also because it gives you great visibility in the hand. If you pot it and he raises then we can just sigh and fold knowing we probably have 4 outs. When you bet this silly amount it doesn't really give us any information about what kind of hand the villain has because he may just be pouncing on the perceived weak bet.
That being said, it is 4 way to the flop so it's pretty likely that he's not getting too out of line, and even with our ridiculous sizing his flop raising range is going to be mostly flushes.
Just fold.