[quote=@Dragonbud]
I'm just surprised that someone was able to jump over Carver without invoking an attack of opportunity 
[/quote]

Well in this case, in DnD terms, it was by all technicalities Carver's turn and he chose to use charge, while charging if you enter any adjacent enemy squares then you provoke an attack of opportunity. So basically Carver was to busy with his face in the shield charging to stop and swing upwards.