[masraum]

Yeah, file a report just in case something else does happen, then you've got a history/paper trail. Hell, I think you could probably file assault/battery charges on him, but that sounds like a pain.

That whole "turn away" thing would have been a huge red-flag to me. Turning your back on someone that seems as unhinged as that kid sounds like a bad idea.

From the less practical more fantasy side, you probably could have gotten away with kicking him down the stairs after he head butted you. "He threatened and assaulted me, I was defending myself."