I think this is the most clinical soccer kick finish
http://youtu.be/oCkf5wLta6Q
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Never had a problem with soccer kicks & would personally love to see knees allowed to a downed opponent which would end a lot of the passive wrestling that is used for control nowadays.
The problem I always had in the old Pride days was the head stomps, that always just looked so more brutal.
Wanderlei on Yuki Kondo was BRUTAL but at the same time awesome.
Soccer kicks make fights flow better and theres far worse things that can happen in mma that are still legal.