 We're going to just talk about the electrical part, and all of that plays together when it works. So that's the plumbing and the electricity. Yes, yes. So the electrical part starts for all of us. We're all born with a pacemaker in the heart in the right upper chamber. From here, the electrical wiring starts, goes to both the upper chambers, then goes through what I call as the AV node or the gatekeeper. So the gatekeeper is the one that communicates between the top chambers and the bottom chambers.