Mike Schloesser - punches the release aid?

Far be it from me to criticise his technique (given the results it delivers!), but watching this recent footage I couldn't help but notice that Mike Schloesser seems to punch the heck out of his release aid on every shot. Looks to me like his thumb hovers over the barrel/trigger, gradually 'approaches' it in a series of little jerks, and then as soon as he actually touches it - BAM - he depresses (punches?) it fully and the shot is gone.

You can see it very clearly here (at 1:40, for...

Mike Schloesser - punches the release aid?