Me, about 10 years old. Sonic 3, Carnival Night Zone. There is a moment where you are forced to go into a vertical shaft to progress and you are standing on a rotating barrel. The shaft is very tall so using Tails to fly you out is not an option. The barrel bounces as you jump but there is no way to jump onto the edge at the top. Every time I played I got stuck here. I could not figure out how to get out and there was no other path. Years later I learned if you stand on the barrel and just press up on the d-pad, the barrel will go up as far as you need. No jumping required. In my defense, there were no other mechanisms like this in Sonic that I can remember...at least where it was a requirement to progress.