Dress up dash

Last night was the local running club's annual Halloween run.
Have you ever needed an idea for the easiest runner-friendly costume EVER?

Ladies and gentlemen, I present...
the Road Runner costume

Don't mind me, I'm just trying to blend in with the road.

Costume instructions:

• You'll need black or dark grey clothing, including a t-shirt that you're willing to "ruin," and some yellow paint.
• Paint two parallel yellow stripes down the middle of the t-shirt. (Paint one solid stripe and one dashed, if you want to get really fancy.)
• Wear this shirt with black or grey shorts, running shoes, and for bonus points add a black-and-yellow mask and carry a toy car.

I think it's a pretty clever costume. Unfortunately it was not clever enough to win the costume contest. (I'll admit that I recycled this costume from a couple of years ago... but no one in FL knows that!)

The contest winner was a man in a very tight guy-slutty-police-officer costume. All I can say is: his shorts were definitely tighter than mine...

What's the best/funniest/most clever costume you've seen on the run?