In reply to Red Rover:
It could be a good way of pulling a knee? If you're strong and get to stand with your heels dug in all the time, it could be alright, but if you started putting your foot flatly on the ground if you started to lose ground, your feet could stick to the same spot enough for you to pull a knee as you got pulled forward by the other team?
Could be a good idea gone bad.
Post edited at 20:38