Best 'Own-Stunts' in a Movie

[Jezza]

So out of all the action movie ever made, which stunts or stunt sequences do you think were the best when performed by the actual actors themselves?

I'll start off by adding the boat chase sequence in Quantum of Solace where both Daniel Craig and Olga Kurylenko had to act, fight and steer the boat all at once, whilst all the gunshot effects were going off. I though that was very impressive.

But what do you think are the most impressive stunts you've seen performed by the actors in a movie?