Lydia starts grabbing beakers and mason jars as Barry moves to the door. She's not a big fan of making explosives, but she does know how, so if that's what she's got to do to get them out of here, then that's what she's going to do. It just always makes her nervous because one small misstep and kablam. She looks up at his comment.

"Yeah, you're right. You do that, I'm doing this. I can't split my attention right now," she says, but she doesn't say it in a scolding way, just a reminding one, because Lydia knows that Barry's just as good at chemistry as she is and understands how this sort of thing works. "Oh, and find something to attach the jars to the door, okay?"