Could it be you're not the joker at all and actually a vampire?

we jus had a discusion abt ths in our clas last wensday(or thurday...not sure...)... itz cald az ACHOO syndrome... yu wud get ful info here... http://en.wikipedia.org/wiki/Photic_sneeze_reflex ... onestly... i mus hav xplaind it... but gues my lingo aint of much uze... so pastin the link... peace!!!

It's the over stimulation of the cones and rods in your eyes. I don't know why this makes you sneeze, but I do the same thing. I looked it up long ago, and that is all I remember.

You are allergic to the Sun.....Partial Vampire...

Photic sneeze reflex is a genetic autosomal dominant trait, which causes sneezing when exposed suddenly to bright light, possibly many times consecutively. It is also referred to as photic sneeze response, sun sneezing, photogenic sneezing, the photosternutatory reflex, being photo sensitive, ACHOO syndrome, and "Achooism," named after the sound made when sneezing, along with its related backronym Autosomal dominant Compelling Helio-Ophthalmic Outburst syndrome. The condition affects 18-35% of the human population. The mechanism of the bright light sneeze reflex seems to be an association of optic nerve fibres and trigeminal nerve nucleus in the mid-brain. The trigeminal nerve's second division supplies sensory fibres to the nasal mucosa. It is postulated that nerve impulses travelling up the optic nerve will cause a sympathetic discharge down the trigeminal nerve fibres. Another mechanism postulates that partial squinting of the eyes resulting from the bright light causes squeezing of the lacrimal sac which results in tears running down the nasolacrimal duct into the nasal cavity, causing stimulation of the nasal cavity which causes a sneeze. A scientist called Breitenbach and others studied the effects of various light wave lengths to see which, if any, would be more likely to cause a sneeze. They found no differences. They also found that the response could be prevented by wearing sunglasses. (Well duh!) Fortunately, there is no chance of your eyeballs falling out during photic sneezing.

i get that every time