Tox Box

Tox Boxes are huge metal boxes that move along a set path in Shifting Sand Land, the 8th world in Super Mario 64. The path is a small maze of tiles surrounded by darker, faster moving quick sand that sucks you in instantly. Besides a singular hole, each side has a face spray painted onto it. The hole is so you can stand inside when it passes over the tile you're standing on. The tile maze has a few Red Coins on it, as well as the course's only cannon.

In Super Mario 64 DS if wario is inside one of them, and wario punches, the Tox Box will fly somewere into the sand, and sink.

In the upcoming Wii video game Super Mario Galaxy, you can see an enemy that attacks in a similar fashion. 

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