Cutting hair

Cutting your own hair is tricky. You're looking at yourself in the mirror, so all your motions are in reverse, but you can get used to that. To see the back of your head you can use another mirror on the wall behind you. You can see what you're doing fine, and since there are two mirrors your motions are reversed, and then reversed again back to normal. The only thing is that if the mirrors are, say, five feet apart, the total apparent distance from your eyes to the back of your head is ten feet, so it looks like you're cutting someone else's hair with really long arms, but that someone else is you.