During the Gene Gadget Boss Fight, there is a conveyor belt underneath that moves Sonic and spiked blocks along its path. However, the way the conveyor belt moves Sonic is "wonky", in that it pulls Sonic back in the opposite direction he is facing, or pulls him along if his direction matches the conveyor's general movement. This causes Sonic to be pulled in a diagonal direction, which makes little sense with the direction the conveyor belt visually moves.
https://cdn.discordapp.com/attachments/315258983399161866/382927967707332608/unknown.png
Save State: https://cdn.discordapp.com/attachments/315258983399161866/382927967707332608/unknown.png