The noise can wear on you after a while.
The pole barn where the gun and parts sales are occurring is within spitting distance of the firing line. Walking around a gun/parts show wearing ear muffs is an interesting experience. You really can't have a conversation while they are firing.
I love their gun show and vendor offerings. I don't go to watch machine guns, I go back for the best deals and variety you can probably find in parts.
I've gone in there looking for some pretty esoteric stuff like a K98az bolt or a Remington stamped 1903 sight hood. Check, found them at Knob Creek, not Show of Shows or National Gun Day.
"We thought about it for a long time, 'Endeavor to persevere.' And when we had thought about it long enough, we declared war on the Union." Lone Watie