You can feel a pressure wave just standing next to somebody firing a highpowered rifle.
Try firing a hot .44 Mag in an indoor range ...
Especially one with a muzzle brake.
I once attended a firepower demo at Ft. Sill, back in the dark ages when I was an AF Lt. One demo was a flight of 4 F-105 Thunderchiefs from the AF Reserve at Bergstrom in Austin Texas. They were each loaded differently. One had high drag bombs, one had cluster bombs, one had napalm (very impressive!). The other one had a couple of 2000 lb low drag bombs. He dropped them one at a time, one in a dive bombing maneuver, the other a "dive toss". The nearer of those was a good 1 to 2 miles away. It felt like catching a medicine ball thrown by Lou Ferrigmo, right in the center of your chest. Umpf!
The Army's artillery was pretty impressive as well.