Bad idea: Squeezing into a pre-pregnancy dress a smidge too early. (Though it did give a couple of my coworkers a nice laugh when my zipper busted open and I had to hold the side of my dress together as I left the office today.)
Good idea: Taking naps with a baby on your chest. (Or a puppy. Or anything warm and wee and squishy, for that matter. A hot water bottle could probably do the trick.)Bad idea: Taking naps with a baby on your chest and her hand in your armpit. (She will eventually twitch and it will tickle.)

Good idea: Running around in the middle of the street during a hurricane. (Especially if you've been sitting on the couch watching bad TV all day.)
Bad idea: Running around in the middle of the street during a hurricane? (I don't know. Seemed pretty invigorating to me.)
THE END.
*Animaniacs? Anyone?