The Batcave looks...different.
Batman Covers Hans Zimmer’s ‘No Time For Caution’ From Interstellar On Accordion

This is a video of skinny Batman covering Han’s Zimmer’s ‘No Time For Caution’ from Interstellar on the accordion. You might not think an accordion cover isn’t going to work, but it works. Me? I am not going to work, I’m just going to pound on my keyboard and pretend to work. “Your monitor isn’t even on.” I never said it was going to be a convincing performance.

Keep going for the video, but things really start getting wild at 1:20. I also included the original for reference.