Oops sorry I tread the hallowed turf of instructordom with trepidation....with a true story and a bit of a question. Whilst sitting in the back of a seneca watching my 'Gemini' buddy fly with our instructor. We had just finished a number of engine failure drills in all sorts of configurations and were now practising our S/E approaches and landings. Unfortunately having reached complete overload my mate forgot his landing checks and failed to lower the gear. As we turned final and got close to the runway, power was being reduced and of course the gear unsafe horn goes off. The horn continues for some time and at last the instructor says...we're a bit fast for a stall warner? Mate replies 'that is not the stall warner...that is the gear unsafe horn'. We continue...we are getting close to an expensive landing....'so what are you going to do about it' says instructor ....mate pauses and advances throttles above 15"MAP, sound goes away. As we get very close and very fast, he reduces power ...siren goes again...panic as realisation floods through and a late gear selection made. Mate insists it wasn't his fault as all through his training the gear unsafe horn is used as an indicator of a practice engine failure. He associated the horn with an engine failure....not with the gear not being down.....anyone else come across this?? Is it a problem??