Don't say "The last one there is a rotten egg": unless you're absolutely sure there's a slow kid behind you.
You can either keep peddling, get off the bike or fall over.
You can teach an old dog new tricks with the right kind of doggie treats.
Whiners usually play alone.
It's more fun to color outside the lines.
Nobody notices it when your zipper is up, but everyone notices when it's down.