I used to do it all the time, just by running my laser printer. I was in an old house that some amateur must have wired, so all the power for the entire second floor, plus both bathrooms, plus all the lights on that floor, were routed through a single GFCI outlet. It would pop every time I ran the laser printer, but only the first time. After I reset the breaker (in the dark, because the lights would go out), I could try printing again and it wouldn't pop that time.