It truly amazes me the precision with which he can turn such powerful swings into exact splits in the stone.  The  most amazing part of this, is that dude’s hand eye coordination. Never missed his mark!  I used to watch my grandfather back in Kentucky do this to make stones for fireplaces I always thought it was amazing how he could take a handful of small wedges and make the rock do exactly what he wanted it to do watching these guys reminds me of that