"Poop, gross. Personally I think putting a face on a machine is the quickest way to Skynet," Cisco says, mirroring Baze's expression and shaking his head. "I do like the DJ-Roomba idea, though. I've seen someone put a music player on one and let it roam around playing jams while cleaning house."

On the question his expression brightens.

"Lot's of stuff. Projects for Caitlin and Dr. Wells, and a couple things for Barry. I'm a mechanical engineer, so basically they think it up, and I build it. For Caitlin it's usually biomedical equipment, like, I made-up or tweaked a few machines for her when she was working on Barry. Dr. Wells, I helped him build the Particle Accelerator. And then I've got my own projects, drones right now, and I'm modifying a suit I created for heat-resistance and protection."