I had an interesting experience as a pax on a domestic qantas 73 a couple of months ago...burly, clearly not having one of her better days, crew thundered up to us. I didn't even have chance to say I was cc when she launched a barrage of sep intensity questions at me.."what command would I hear when I needed to use it, when would I not use it, what situation would I use it without hearing the command" etc etc. When I rattled off the answers and outlined the finer points of what constituted catastrophic and non catastrophic she seemed more than a little crest fallen...The poor civilians sitting in the row behind didn't fair so well and were promptly moved...
I'm all for a thorough briefing but this one had even me sweating!