I just came across this and thought some others might be interested to read this:

http://www.telegraph.co.uk/news/2535...ers-laugh.html

It's about a so-called 'anxiety gene' scientists claim to have found that makes some of us into sobbing, screaming wrecks whilst watching horror movies, whilst others laugh!

Personally I'm more of the running away, hiding under the covers type that screams and my partner sits there hooting with laughter - I always thought he was completely nuts, but it just seems that he has a totally different gene!!