Notice it busted off their tungsten carbide nozzle when it exploded. Those are expensive.
They also need to change their orifice because it’s worn out badly.
Also they appear to maybe have turned off the abrasive flow and entered the wheel with pure water for some reason. You can tell because it didn’t leave abrasives embedded in the tail of the deck except for around the initial plunge hole.
Also I am pretty sure the deck breakage is from wheel debris and not the water blast.