(If Leo has to hear about research on the placebo effect he's never doing anything nice for Donnie again.)

Leo grins despite the emotional situation, happy that Donnie is happy. He'll give him a minute to gather himself, eyes roving over the tank until they alight on something he still doesn't quite understand.

Leo makes sure there isn't any more sniffling before he says, "Uh, sooo... what's up with the taxi, by the way?"