Thunder Cloud

The Thunder Cloud is an item belonging in Mario Kart series, appearing specially in Mario Kart Arcade GP, Mario Kart Arcade GP 2 and the upcoming Mario Kart Wii.

When obtained, the player automatically receives a boost of speed, constantly. However, the Thunder Cloud will eventually strike Lightning at the player, just shrinking them. The Cloud however can be passed on to another kart by bumping into any other racer before the lightning strikes. To use the item efficiently, the player will have to bump another player and let him be shrinked instead.