Five reps of:
100 squats (body weight only)
On a totally unrelated topic, go and vote for my photo on the Petzl win your weight in gear competition. I have 14 days starting from yesterday to get as many votes as possible. To vote you just click on the stars next to the image (preferably on the 5th star to indicate your high opinion of my photo). If you've got a nice photo or video that is something to do with light, you might want to think about entering too. Anyone's body weight equals a lot of Petzl gear!