A tiny hole can empty a great big bucket.
If you want to see a shooting star, you might have to spend a lot of nights looking up.
Before you trade sandwiches, check between the bread.
Ten minutes is short if it's a recess and long if it's a punishment.
Don't say "The last one there is a rotten egg": unless you're absolutely sure there's a slow kid behind you.
It's easier to knock on a door that's not shut all the way.