[Shooter 2.5]

One of the witnesses at the car wash thought the vacuum bag blew up.

[seeker41]

[Yasotay]

I don't know what a vacuum bag blowing up sounds like but I would guess it is loud. I remember the supersonic crack still is what made most of the noise (that is being about 4 - 6 ft below the target, in the pits, at a KD range).