[MJL]

Some players will call all raises and if no paint hits they will try to push you off your hand. The thinking is you have AK, AQ, AJ, KQ most of the time and you cannot stand the heat. I would have tested him with a raise. Remember this person is known to be agg preflop so to limp means its unlikely hes real strong. If he is real strong he started out slow playing to trap you and to expose his trap on the cheap street is not part of this kind of play.