A photic sneeze is often caused by what stimuli?

More Questions:

American Hamilton Smith patented what in 1858?

Once married to Ted Hughes, which American poet committed suicide in 1963?

What country was called Northern Rhodesia until 1984?

How many U.S. states are there?

How deep is a fathom?

Who directed the movie "Taxi Driver"?

What 1984 film features small, furry creatures called Mogwai?

Who had a hit in 1994 with the song "Shakermaker"?

Who are the Glimmer Twins?

Prior to becoming President of the US, what political role did FDR hold?

In World War II, where was the defensive line known as the "Gin Drinkers Line"?

"Diamants sur canapé" is the French translation of what American film?

Who hosted the 2007 Brit Awards?

Who sang the 1995 song "Boom Boom Boom"?

In which US city would you find the Space Needle?