iv done it,im orginaly from the basque country of france so i grew up about an hour and a half from there.i used to get up every morning when i was a kid and watch the races live,allways sayin one day i was gonna do it.i have to say it was one of the scariest things iv ever done,youv never ran so scared,im talkin panting like a girl when you feel the cobble stone streets rumble and the bulls run by you and there heads are at your shoulders.iv seen all kinds of injurys,the best is if your in the top tier of people you race into the arena,and your running around the grounds of a very famous arena where many bulls and matadors have been slain.you cant be all fucked up and drunk,if police or locals see you,theyll straight yank you out of the gates,they dont give a fuck,oh and if you hit the bull with anything but a rolled up newspaper,get prepared to get straight jumped by the locals,iv seen on many occasions some single american dude get stomped by like 15 locals,and not hitting lightly,tourist dont understand anything about the respect the spainiards have for the bulls.i dont know if id do it again,one time was enough,you literealy feel your peanuts shrivel up into your stomach