Super Mario World/Enemies/Grinder

A Grinder is a razor bladed disc and a frustration for many gamers. They are a nightmare to avoid and tend to take the life out of the game.

Practice and come prepared. Capes do tend to help but a lot of the time the cause you to fly into other Grinders which are falling from the ceiling. They are also invincible. You can spin jump on top of the Grinders, but no regular jumps.