Originally Posted by ChrisPontius
Bonavena should be credited as the only man who knocked Chuvalo down.
Based on the footage, I agree with this. He didn't slip, but was outmaneuvered, caught off-balance and out of position when he fell down from punching. That situation is a knockdown by definition (even if Chuvalo wasn't stunned the way Foreman later rung his bell). Anybody who thinks Ringo always had slow feet should check out how he was skipping side to side immediately before this happened.