It is very hard to play less. At my church gig I constantly find myself playing fills where there don't need to be any. So the next verse has no fill, and there is that breathing room-the air chamber. Just an observation.
Next are the crash cymbals being used by the drummer for Govt. Mule. They sound EXCELLENT. That crunchy, almost china-like tone is perfect for that situation. Quick decay, too. Sabian HHX. Are these similar to Zildjian A Customs? He has good technique... like Simon Kirke. What a fun gig that must be!