Friday 021213

1 Pull-up
1 Dip
1 Sit-up
2 Pull-ups
2 Dips
2 Sit-ups
3 Pull-ups
3 Sit-ups
get it?
Continue this sequence as far as you can for exactly 30 minutes)

Notes.
1. No "crappy" pull-ups, dips, or sit-ups. Perfect form, please.