when i realise that you can save one keypress on a microwave by typing in 90 instead of 130 for one and a half minutes
when i remember that my microwave is one of the ones with a knob instead of a keypad so this cool trick doesn't work for me
in unrelated news i just found out that ffmpeg lets you reverse videos by just applying a video filter called "reverse" so that's cool
people seem to have trouble believing that microwaves with keypads exist so here's an example of one 
and here's an explanation of how it works:
digits fill from the right to the left, so typing in "5" always means five seconds and never five minutes. five minutes is "500".
one minute and thirty seconds is "130", which is interpreted as "1:30". however, typing "60" does not autocorrect to "1:00", it stays as sixty seconds. you can go as high as ninety-nine seconds. thus, you can type in "90" and it'll run for one minute thirty seconds
okay now there are other people who are having trouble believing microwaves *without* keypads exist 
here's one with a knob
@lynnesbian I have one with a knob and no numbers. It’s the worst microwave. I mean yeah it heats but it goes in 0:10 increments until you hit 5:00 and then increments in 0:30. Except when it’s ignoring the knob (and increments not at all).
Which is bad but not as bad as when you try to stop it beeping. One you miss the 0:01 mark, it WILL BEEP LOUDLY THREE TIMES no matter what. And then again once every minute until you open the door.
