This is a glitch in Turtle Woods, and it involves the ability to fall back into the bonus round after completing it, thus getting trapped inside. The glitch is performed by doing a slide on the edge between the platform and the circle that surrounds it. However, after being inside, Crash becomes stuck and the only way the player can fix this is by making him fall into one of the pits so he can be transported back to the main path. This glitch can also be performed by jumping on the edges of the hole. This glitch has only been observed in Turtle Woods.
The glitch occurs because there is a small section of space between the platform and the ground circle which allows Crash to slip between the two and eventually fall inside the bonus stage.