What do you do when the music stops?

I was in the cath lab at 3 a.m., just after a stent went in, and the surgeon turned off the monitor’s beeping. The silence wasn’t empty—just full of something else. I kept thinking about how we’re all waiting for the next cue, the next rhythm. Not just patients, not just me. What do you do when the music stops? And what if it never comes back?