Hmm, I'll have an each way bet and say
Stupid child for not doing what he was told, BUT stupid parent for not putting the camera down and dragging that child (kicking and screaming, if necessary) from behind the obviously not-happy horse...
That kid got owned, might make £250 for that!
No in all seriousness it serves him right for not listening but cannot believe the parent didn't go get him before he got kicked but nope just kept filming. Poor kid.
Good job the horse didn't get him in the head. Kids ARE stupid, they don't understand risk, so I blame the parent 100% for not taking steps to stop this.
In fact, I have a nasty feeling this was set-up. Why else would someone be filming the back end of a nervy young horse? If i video my horse, i video her front end, not her back !