Fwoosh

Fwooshes are enemies in Super Mario 64, appearing near the top of Tall, Tall Mountain. They are white clouds with faces. They will attempt to blow the player off of the mountain. They can also blow the player's cap off, which will then be grabbed by Ukiki.

Thunderstorm Fwoosh
There is a chance in some personalized copies of Super Mario 64 that a Fwoosh will appear as a black cloud and have the same electricity as an Amp.