Not condoning their behaviour in anyway at all, but sometimes I think kids believe they are indestructible. Lets be honest, we've all been there! Of course, as for his foul language... Totally not cool.
Not long ago I was driving (not riding) down a main road, heading into Manchester and a ball rolled into the road - closely followed by a suicidal kid! Thank god myself, the other car (dual carriageway) and the oncoming traffic were paying attention. Even though none of us were obviously speeding, it just pays to give the road full attention at all times as things like this can happen in a flash. The joys of a public highway eh?!