Never been pepper sprayed, but did some training with the Marines in Iceland that involved tear-gas. The gas-chamber in Navy bootcamp was a joke compared to the way the Marines did it. In the Navy they used a pill form.....the Marines used an entire canister on us in about a 20X20 tent. It was brutal. We just threw away the uniforms we were wearing. And showering was nasty, like benchmstr said with the pep spray.