It never ceases to amaze me, how, for the 15 years that I work in a building with an elevator, that I see people still get in the wrong one.
You don't have to be a math wiz, or even a good cook, to know that on the planet Earth, when you're standing in front of an elevator, and the up light-lights up, IT MEANS UP and vice versa.
In case you never took elevator 101, there are two lights (usually) at the top of the lift.
When the light on the top lights up, this means the elevator is going up to floors numbered higher than the one you're on.
When the light on the bottom is lit, you are going DOWN!