He had a good kill in his invo (statius, bandos icon, dmed, amulet, obby shield, brace) and had just killed that other guy, who is dying, and then he got pjed. I think..
Ofcourse, Jagex listened to all those threads and people saying stop 26king yet when someone makes a thread about Pjing it gets ignored :\. Anyways, that really sucks for you .