Upcoming Extreme Bonita Crossfit WOD

On Sunday at 7am I'lll be taking on the workout from the 2010 Crossfit Games called "Stacked Helen".
"Stacked Helen"
3 rounds for time

Round 1
1200 meter run
63 KB swings with 40lb KB
36 pull ups

Round 2
800 meter run
42 KB swings
24 pull ups

Round 3
400 meter run
21 KB swings
12 pull ups