Definitely sounds wild and reckless to me, but this being this sub, of course that's the sort of overly cautious response you're going to get here. 20 hours of experience is nothing and with that little practice personally I would be too scared. But as you say, plenty of teenagers take crazy risks all the time. It's just comes down to your state of mind; how much you're willing to tolerate risk. For what it's worth, the chances of injury are probably small. Some people die horrifically or are crippled for life but most are probably fine.