Do you practice or did you practice any rare sport?
What you think about ''Free Running'' ?
That's my sport.
I'll train every week 1 to 5 hours.
It's with a pretty high difficulty level tho, but when you master some tricks it starts to be very cool

Here is a movie from ''Free Running''
For the people who don't know what it is.
http://video.google.nl/videoplay?docid=515642196227308929&q=free+run
Also you have an other variation on free running.
It's called ''Le Parkour''.
The difference is Free Run is running from A to B with the most coolest tricks you know.
Le Parkour is from A to B as fast as you can, with the fastest tricks you can perform.
¥+¥=¥¥