A customer's freehub was full of glitter from a parade
Had a bike in the shop with a totally seized freehub, wouldn't spin at all. When I popped it open, it was packed with this fine, colorful glitter (like from a kid's craft project, but everywhere). The rider said they did a holiday parade last month and must have rolled through a bunch of it. I got it cleaned up, but I'm still finding sparkles on my bench a week later.