"I know the weapons are neat. But do you want to cause a fumble, a knockout, or a kill? Nothing is more effective than charging your enemy from behind."
When you turbo in the forward direction, you can cause a Charge attack. Charges do Shock damage, and lots of it. They have the best chance of causing Shock Criticals.
They also do it to both players involved in the attack -- so it's very possible to charge into someone and end up getting knocked out yourself!
Each player's strength is calculated based on remaining health and position. Two other factors affect things:
When you charge someone from the front, its a lot different than charging them from behind.
This makes the tactical aspects of charging -- angles and timing -- have a huge impact on the outcome of a charge. Yes, your position matters (Forward, Halfback, etc), and yes, you want to whittle down the enemy's health. As you can see from this video, the big difference will come from hitting them in the face instead of hitting them from behind.