On Jan 24, 10:10*pm, Mark Lloyd wrote:
I know someone who has a bad habit of interrupting the microwave by opening
the door and NEVER completing the cycle (just press the cancel button). Some
microwaves beep when this happens.

Hmmm... On our microwave, if you let it finish, it will beep every few
minutes to remind you there's something in there until you open the
door... Of course, in this case, it's the same sound it normally makes
when it finishes, which is pretty obvious.