A Home for Mould

I found some black mould growing on the cap of my water bottle. I was about to be thoroughly disgusted when the little black dots began to move. I dropped the cap on the table, freaking out. They proceeded off the the cap onto the white tablecloth. And there they started to dance. They moved in circles, zig-zags, and jumped up and down. I grabbed the cap from the desk and clamped it on my bottle. All of a sudden, the molds scattered frantically. I let them back in, and this is how I ended up buying a second bottle.