When a tank slides on a single force floor or ice, turning direction from horizontal to vertical or vertical to horizontal, and hits a blue button as a result, the blue button will take effect before the tank is discovered to be moving in a different direction, and the switch will take effect against the original direction of the tank, rather than the new direction. The result of this is that the tank spins like a top, giving the glitch its name. It is likely that this is a relative of the Button Smash Glitch.
Should there be more than one sliding tile, the tank will recognize its change in direction, and point in its original direction before the switch takes effect.
Currently, there are no official levels where the Tank Top Glitch can be used. This was originally discovered by David Stolp, and described to Mike Lask, who made a level based off the use of this glitch, called Tank Bug. This is level 320 in MikeLrejects.dat, and an AVI solution below, yielding the current 124 bold time, demonstrates how the glitch and the level itself works.
Tile World currently does not recognize the Tank Top Glitch.