Sonic 4: Episode 2 - White Park Act 1 -
I was holding off on this run because there's a rather large mistake at 0:52 (not activating team roll when on the platform), but right after that, I managed to do a jump that I didn't know was possible at the time. Ended up finishing the run with a nice sub 1:23. I was trying to better this, but sadly I couldn't, so here's the video. Enjoy :)