If there were other kiters out, you maybe could have got them to come and help. Thats what I do, mostly because people hate being told they need to "learn", and they shouldn't be doing it by a 17yr old guy. Get backup, preferably someone really big.
You also could have told him, if he doesn't know what he's doing, you'll help him launch it, then when you get ready to let go, deflate the kite, and run away.

mick91 said...we should put L plates on kites for learners haha

It's been mentioned a few times , and I think it a top idea. When I was learning I would have prefered to be easily recognised as a learner.