Roommate's shouldn't cut hair.

If you let your roommate (who has never cut hair before) give you a "trim" make sure she knows that a trim means only a short amount. You might end up with a lot shorter hair than you expected.

before the hair was cut

If your gas light has been on for three days, it's probably time to get gas. Being stuck at a red light with a line of cars behind you is not fun.

If your roommate tells you that apartment 107 is watching Harry Potter right as you pass their door, don't put your ear against it to listen. Two of the girls from that apartment might walk up right then. They will think you are such a creeper.

If you have really bad gas, make sure you are never alone with another human. When you let one rip they will know its you. And even if they pretend not to notice, both of you know the truth.