The reaction catches Leo off guard, but not as off guard as...

We almost lost you once.

almost

Leo stares for a moment, his eyes almost blank, as the words and their implications wash over him. What does it mean? What is Donnie referring to?

They did lose him - or rather, he lost them, but he had to, it was the only way...

Leo wraps an arm around Donnie again, much more loosely this time, more on instinct than anything. He's staring somewhere beyond Donnie's shoulder.

"I just meant... I mean, if I'm a... zombie, or whatever I am now, it's probably not a big deal. That's all. You don't have to worry about it."