HW is just a knockdown bonus. Roll progression goes:
1. Break Block roll
if win-> go to step 2, if lose->

2. Reverse Pancake roll (augmented by heavyweight)
if win-> pass go, collect 200 dollars, if lose-> go to step 3
3. Stun roll
if win-> run directly into the next offensive linmen because Bort hates you, if lose-> go to step 4
4. Slide a millometer sideways and go back to step 1.