Yes, microwave ovens are ubiquitous and are in just about every home so they seem a harmless enough appliance - and they are if one uses them as intended.
Inside however lurks great dangers. Transformers in, say, 1kW MW ovens are truly lethal devices. They supply well over 1kV at a current in excess of one amp! Given that one only needs about 70mA across one's chest to call it curtains, simple math says that these transformers have much more than ten times that capacity.
With such a high voltage one doesn't even have to contact a terminal to be electrocuted, a small arc onto one's hand is all that it takes.
I hate giving lectures like this because I sound like a lecturing PIA schoolteacher but I speak from personal experience. I've had several nasty encounters with electrons where I've definitely come off second best.
Certainly the worst was when I accidentally came in contact with the secondary winding of a transformer that supplied 850V at 125mA at full load - that's far short of what a MW oven's transformer is capable of delivering.
It was a momentary contact and my muscles recoiled rather than gripped (as they so often do in these circumstances) - had they gripped then you wouldn't be reading this now.
I was in the middle of the room and was thrown back against one wall and the transformer hit the opposite wall with sufficient force to put a dent in the brickwork. I couldn't move - essentially paralyzed - for about a half hour and no one was around to help me at the time. I was very lucky to survive.
Again, remember your microwave oven transformer is considerably bigger and more powerful than the one that zapped me.
As I've said on previous occasions, MW oven transformers would make good substitutes for those used in electric chairs, they'd be equally as effective.
Horrible, gory thought but true.