There is a loop positioned right behind Metal Sonic's standing point.

This likely isn't a glitch, but rather a way to prevent exploits that used to happen in Sonic the Hedgehog 3 & Knuckles, such as going through a crusher or wall.

This happens to Classic Sonic more often than Modern Sonic. If Sonic gets crushed or hit by certain objects while trying to turn into Super Sonic, he will lose Rings and not be allowed to turn into Super Sonic. If the player takes damage as Classic Sonic in any level and falls next to a wall, a large portion of their Rings will stick to and climb up the wall. When Sonic re-enters the level, the wave sent from the boost will be seen. To perform this glitch, the player must boost and pause at almost the same time, then hit Restart. Sonic will not be able to turn into Super Sonic until he collects at least one more ring. If Sonic jumps while grinding and turns into Super Sonic in midair, he will continue grinding with the Chaos Emeralds briefly hovering around him instead of transforming. Much like in the classic Sonic games, certain actions can cause the player to become stuck in walls, forcing them to restart. Many of them have not been confirmed by Sega.

Unless otherwise noted, all glitch names are conjectural.

This article contains a list of glitches from Sonic Generations. Main page Script Credits Glitches Beta elements Gallery

Skate 3 glitches super jump