Wrong Warp

A Wrong Warp is a glitch where the game loads the wrong chunk when going through a chunk boundary (not a loading zone).

100% speedruns
In 100% a Wrong Warp is used in the Academy of Evil to go from the boundary of cogpa04/cogpa05 to cogpa05/cogpa06.

Other
A compilation of wrong warps by Atomical_Sloths. This video also contains at least a leftover loading zone.