The Unlocking of Knuckles in Sonic 3

There is a bit towards the end of Angel Island Act one where there is a stone wall that you can't break a Sonic. Tails couldn't carry Sonic before, now he can. He could fly before, but not under your control only when the computer was playing. So if you've got a second controller, you can fly and bend a younger brother to play his Tails. Brilliant. If they're ever going to get a chance to say absolutely mad things on a podcast, it's going to be this one. But do you think that that in any way came out of Sonic CD having multiple different types of each stage? Because if you think about it, having alternate routes through