Yep - the guy zooming past us on the motorway whilst pulling a wheelie looked very impressive! Apparently it's very easy to lift the front wheel when riding a powerful motorbike - a lot of bikers do it a little when pulling away from the lights, it's just a bit of fun, 'specially if they're with a few mates! Young blokes like to show off a bit, and there's nowt wrong with that!
However, (look out- Mr sensible mode on!) it only takes a slight wobble or a bit of side wind or misjudged throttle for things to go seriously wrong! There's hundreds of vids on Youtube of wheelie crashes - one minute showing off looking cool, next second a totally trashed bike and a few weeks eating hospital food!
http://www.youtube.com/watch?v=LHXBu4IO_qQ(you might need to right click on this link and open it in a new window)