When Warp Dash Jumping, an interesting phenomenon may occur where you dash jump in the opposite direction to where you dashed. This is called a Warp Boomerang, because of the boomerang-like motion you travel in.

This is very useful for confusing enemies and creating incredibly tricky and slippery movement.

The Warp Boomerang has very difficult timing; you have to use Warp Stone then jump on the very next tick. Any other tick and you will execute a normal Warp Dash Jump.

To execute, dash, then use Warp Stone. After the warp, jump on the next tick. Your dash jump should go backwards.