Oh, I see. Here’s my thinking: you don’t invite the king after refusing to pay your taxes without some sort of plan to make use of the king’s physical proximity, because that’s not exactly a strategy likely to gain royal assent to a charter.
So I could definitely see Aerys escalating things to violence when Darklyn had hoped for a more bloodless scenario, but I think there must have been some plan to seize the person of the king.