There are really only two situations in which I like betting into the raiser from early position...one is when I flop a monster, know their an aggressive player, or feel confident they hit the flop as well and will bump it enabling me to move all in. The second is a stealing play I sometimes use when I'm big stacked in a 1-2 cash game where I intentionally call a large raise of say 15-20$ out of EP when NOBODY else has called before me in hopes an A (or even a K) will hit the board and I can fire out a bet making like I hit that Ace and they fold their queens or jacks...every player is different, but from my experience...typically pre-flop raises of 8-10 times the BB in 1-2 or 2-5 are often indicators the raiser does not want to see an Ace and often a King on the flop as well. I occasionally will not even look at my cards in the SB or BB in this situation until after I've won the hand...its a pure stealing play I like to use to keep the rarely seen bluffing side of my game sharp. I do not like betting into the raiser when I flop something like an open ended straight or 4 to the nut flush...I know many players do this but all that usually winds up happening is that the initial raiser bumps it making you pay 2 to 3 times more than you'd have initially had to pay to the see the turn had you simply checked it.