AdvertisementReport To Army Finds Blast From Some Weapons May Put Shooter's Brain At RiskApril 30, 2018Jon HamiltonfacebookEmailU.S. Marines fire the Carl Gustav rocket system during live-fire training last October. With each firing, the shooter's brain is exposed to pulses of high pressure air emanating from the explosion that travel faster than the speed of sound. (3rd Marine Division/DVIDS)