I just found out one of the girls died in this. Not quite as funny.
you can laugh away
http://news.bbc.co.uk/1/hi/england/southern_counties/5238656.stm
hence my previous post
On reading the link it appears the ‘fatality’ story is another urban myth (hence *my * previous post)? 
“Insp Mark Piper said the two boys and two girls, all aged between 15 and 17, would voluntarily go to Crawley police station on Saturday”.
also, a further link on the same page:
A spokesman for Crawley Borough Council described the stunt as “phenomenally dangerous” and said it could have ended in a fatality. “It is a bit like Jackass but this is a lot more dangerous because it involves children rather than people old enough to know better,” he said. “We have checked local hospitals and we have been assured that no emergency admissions have been made relating to this.”
we can laugh again then! 