Thats fucked up, shit like that can stay with a person for life.
This is one case of PTSD in a civilian that I would probably believe. Having a gun thrust in your face by what you believe to be a criminal would most likely leave a mark.
You know that general counsel is going "THIS is why these idiots should run shit like this past legal first!!" He has got to be dying a slow death inside - maybe more so if he DID sign off on this "training". Our GC would be going postal on some people... Ten bucks says this was some fucked up HR stunt.