Go-To Demo Disk?

Couldn't find a post like this by searching, but what is your go to disk to show new guests on your system? I've got some folks coming over to watch the Project Hail Mary 4k disk (outstanding btw, I don't want to hear ANY complaints about film grain) in a week or two and I'd like to show them the 3D capabilities and Atmos of my home theater system.

Thanks in advance for your recommendations!