You do hear the sound wizzing by, in high school we used to dress up in camo and body armor and have airgun wars in the forest.. The rules were nothing over 400 FPS. The CO2 handguns with the spring loaded clips were (BB rounds) and single shot pump rifles were what we used. No head shots were allowed although I was hit several times in the head and once in my mask, thankfully it was deflected.. we were a stupid bunch, never underestimate the boredom of a group of teenagers…This was before the paint gun really gained steam. Real bullets wizzing by has to be nuts….