Tetraspace

Out in tetraspace, skysurfing uniquely provides athletes the power to maneuver move up/down left/right and forward/backward, and to control their relative speed, which counts as a fourth dimension if you enjoy science, science fiction or psychotropic mushrooms.

The shape that results from this extension of a cube into tetraspace is called a tesseract, or 4-hypercube (Figure 3.9).

I cannonball through tetraspace on my quest to find Mariko.