Did one time have a friend, - now an ex-friend, who cooking HIS own Xmas dinner, decided to finish with a microwaveable Xmas pudding. Being a "sensible" person, he proceeded to read the instructions on the packet - which stated 2'30" for an 800W microwave oven - fair enough he THOUGHT, however he failed to look at the size of said microwve oven, which was a 2200W catering size.
Which he then proceeded to start - result explosion of microwave oven tore the verticall rising door totally off the front of the microwave - which then resulted in paying for the microwvwa.
Cost to my friend was £1250 out of pocket, and a permanent ban from kitchen.