Not bad, but one of my favourites is an oldie about the two wildlife photographers in the deepest darkest part of Africa on the trail of a pride of lions.

They find the pride and are laying still in the underbush when a big hungry lioness catches their scent and slowly starts to stalk them, as she begins to gather speed one of the photographers reaches into his bag and pulls out a brand new pair of Nikes running shoes and starts lacing them up.

His mate turns to him and says "What are you doing ??, they aren't going to help you out-run a lion"

To which his friend replies "I know that !! but they will help me to out-run you"