Loki relaxes like he's preparing for it. You know, all that pride he has to get around to even get close to apologizing sincerely. Oh, it probably won't be sincere even then.

Ah, well. He sighs and starts to speak, "I really am--" Now is an excellent time to remember his throwing knife. He curls his fingers around it and stabs him in the torso. It's short enough he shouldn't nick anything major. Maybe.

"--deeply sorry." Which ends in a growl.