Water pistols are cool, but you're not really supposed to play with them after you get a 'teen' in your age.

Similarly, sneaking around the city, stalking complete strangers in an effort to 'assasinate' them with your water pistol is also fun, but you're not really supposed do that... well, ever.

As a result StreetWars really shouldn't work. We should all be too mature, too busy and far too reserved to sign up to something which requires you to pick up a manila envelope containing the name and address of your 'target', who you then have to hunt down and eliminate before someone else can do the same to you.

It shouldn't work but it does. It's worked like a dream in New York, Vancouver, Vienna, San Francisco and Los Angeles, and now it's hit the mean streets of the big smoke.

There are only 125 places, so you'll need to be quick but once you're signed up be prepared to soak or be soaked. If you make your first successful 'kill' your victim has to hand over their envelope containing details of their target and the game continues until an outright winner emerges to claim their cash prize. Think 'Running Man' but with super soakers.

Good luck and remember: stay dry!