Hagrid's Pink Umbrella

Rubeus Hagrid's umbrella was used to hold Hagrid's wand after he was expelled from Hogwarts School of Witchcraft and Wizardry in 1943. However, since he never graduated, his magic was never flawless.

Examples

 * In 1991, Hagrid tried to transfigure Dudley Dursley into a pig, but instead just gave him a pog's tail.
 * During the Battle over Little Whinging, Hagrid tried to repair the sidecar of Sirius Black's motorcycle, but instead destroyed it completely.