A Red Shell
The Red Shell is an item in the Mario Kart (series). When launched, it will go towards the nearest racer. If the Red Shell hits a wall, it will get smashed. But, avoiding the Red Shell can be easy. Just hold a Banana, a Green Shell, or Red Shell behind you by holding the item button (left or right on the D-pad for Wii Wheel users.) Another way is to have a Mushroom, zip ahead of your opponent, and the Red Shell would hit them instead of you, or a star would destroy it.
History[]
The Red Shell has appeared in all the Mario Kart games.