Originally Posted by Scooby Steve
The salesman was trying to talk about RMS (Root Mean Square averaging), a way of accurately reflecting the perceived loudness of some sounds, as in a stereo having 250 watts RMS. Alex, a stereophile and Warrant Officer found it hilarious that the guy was talking about Regimental Sergeant Majors (or is it Sergeants Major?). That appointment is usually held by an army CWO.
Yeah, that's pretty funny