Leonard can't fathom someone just sticking by him the way Mick is saying he would. Will. Is? It's not the kind of thing he's used to, but God, it's a nice thought. The kind of thing he could really sink into, and hope against everything that nothing ever pushes Mick into a position to have to break that promise.

"Yeah, but...who knows when that'll happen." It's almost a joke in self-derision. Because he knows how crazy he can be over some things, and he's proved pretty well tonight how clueless he is in others. He just can't ask Mick to wait for him like that.