[ dave can't help it: there's an immediate laugh, although it's soft and more a huff of breath than anything else. he's loud online and he rambles in person, but he's never really had huge over the top reactions - blushing aside, which he just isn't doing right now.

he feels like he's a kid again.

but which dave? ]

He got too into mad science, unfortunately. Turns out that stuff can kill you, or get you turned into a llama. He's had a very hard life? But I am assumin' this means you intend to accept the roommate thing.