Dude! If you drop your kite on somebody's head, like you did today at Pinnaroo (because you wanted to land it yourself with 20 other people standing around?? or did you just park it over somebody's head instead over the water??), show some good manners and care by saying "I 'm sorry, are you alright?". Just pretending that nothing happened is not on!
Sure, everybody makes mistakes. Just don't be cocky afterward! Stand up to them and learn from them so that we can all have a good time