"Oh, please. Like you'd want anyone else saving your life."

Guess what he is never going to let go? It is that. He'd consider this pay back if he cared enough to think he owed Knock Out for help after Ambulon slapped his shit. He does, however, let the medic cling on to him. Medically inclined he may not be, but he can still see that, in his professional opinion, Knock Out has lost a metric shitton of energon. Guess he'll just give support around Knock Out's back. It's something, at least.