Spindrift

Spindrifts are creatures appearing in Super Mario 64. They function like the Spin Block from New Super Mario Bros.

Behaviour
Spindrifts bounce anyone who jumps on their head into the air. Afterward, that character will float down while spinning. Destroying a Spindrift is impossible.

Trivia

 * Their design is similar to a Floralian from Kirby Triple Deluxe, but this is a coincidence.