I just ran into a weird bug after Robotnik in Angel Island. I was Hyper Sonic, and when I defeated Robotnik I heard Knuckles destroy the bridge before I even hit the capsule to end the stage. When I did so, I ran over to where the cutscene would have started, fell into the gap, and died. I'm trying to reproduce it but I have no idea how I originally did it. Maybe you can figure it out?