We seriously mean it. Slow down now!

I'l be back shortly, but it depends on the wind speed.

Another fun way to write a 45 mph speed limit.

It's just a little over the speed limit. No big deal.

A redneck sign with proper spelling.

I wonder how your face would have looked like if you hadn't wore your helmet.

Nothing else says you were speeding more than having a helmet full of smashed flies.