Refractions
Refraction of sunlight in raindrops
Because he thinks they're part of the illumi-naughty
Prism (Note: I made this joke up. Sorry if this little note refracts from the humour.)
Hue hue hue
It was a clear day
Math problems actually exist
Denim denim denim!
Fi-Do!
Well, chiropodists like jokes. But opticians like them.
Because it's inefficient!
Ray on Paulie's Ester
Ray!
I did! Well here's the elastic band.
A hot rod. NOTE: When I was about 5, I thought this was the funniest joke on earth.
Turn off all the lights.
They turn out the lights.