Item description:

Since the very first day I played it, something has bothered me about SMAS’s version of SMB (and Lost Levels): when Super Mario smashes a brick, he doesn’t rebound properly. In fact, if he hits a brick at the peak of his jump, he’ll actually be pulled upwards into the brick! (I find this kind of odd, since the games are just heavily modified versions of the original NES code, for the most part.)