I have to agree in that I don't think I've ever seen too many worse tackles than this one. It literally is a drop-kick towards his knee. Ronaldinho is a very very luck boy (rabbit).
Ronaldinho, is (A) a very lucky man, and (B) the calmest man alive.
Knowing I was alright, I'd (probably) have attempted to kick the shit out of the chap that tried that.
Perhaps Ronaldinho didn't realise how bad it was at the time.