The very handsome Daniel Radcliffe and the very beautiful Emma Watson were in a competion to outrun their co-stars.
Dan and Emma tried to run faster than each other when their director asked them to run like maniacs on more than a few occasions. But the lazy Rupert Grint was in no mood to compete in the competition. He would just stay around and make sure that he he wasnt left way behind.

This competition was going on in the first installment of the Harry Potter and the Deathly Hallows which will come in two parts. The first part will be released this year and the second sometime in 2011.