(This week's article comes from a question asked in the RGMechEx Discord server. You can join it here!)
So here's a thing that me and a bunch of other people have noticed before: the breakable bricks in the Super Mario All-Stars version of Super Mario Bros. seem less firm than in the original NES release. That is, they don't seem to pack as big of a punch to Mario's noggin when he hits one from below. In fact, if you just barely bump a block at the apex of your jump in the Super NES version, it will send Mario upwards for some reason.
Mario's head hitting bricks in this game is like a hot knife cutting through butter.
I've heard that the developer's accidentally reversed Mario's impulse velocity when breaking a brick somehow, but that doesn't seem right. We've known that most of the code for the All-Stars releases of games was just a copy-paste version of the NES versions, so it sounds unlikely that a random byte would be changed like this. Time to investigate!