Possibly done this before.

I am currently driving a very tiny courtesy car and it has a very prominent REV COUNTER.

I have no idea what anybody uses the rev counter for.

Almost all the buttons on the microwave that don't either set the time or set it off.

I have some buttons on the outside of the fridge?

Remember when old CRT monitors had that button that made it go >>>PING<<<.

You do some now.