I was walking past a stall that had LED spotlights, salesman was trying to explain the benefits of them to a man who was having trouble understanding. Salesman got quite nasty and said something along the lines of "I can't dumb it down any more than that, if you still don't get it now then you're not gonna get it ever." very unprofessional and I'm sure anybody that heard this happen would have been put off buying anything from this man.
Tappa tappa