Watch a tap tackle in rugby. No rugby player would lose their balance from what happened to Benteke. His feet don't hit each other. He feels contact, bends both knees and throws his ankles in the air. You're talking shite.
And to answer I'm quite the athlete yes (what sort of idiotic remark was that?!? As if you can body shame me into admitting defeat because I'm "not an athlete") I'm actually roughly the same size as Benteke, or was when I was his age and at 6' 3" and 15 stone there is no way the slight brushing of a knee on his foot impeded him. He even states afterwards "I think there was contact" which totally ignores the fact that 'contact' has nothing to do with it. Was he impeded? No, he wasn't.