It seems like my snakes do that all the time. I thought Speckles got out, I couldn't find him anywhere. I even took everything out and placed everyone elsein a small tupperware container while I looked for him. I dumped all the substrate out and still couldn't find him. When I gave up and started putting everything back, he had his head peeping out of a log like "huh? What's going on? What did I miss?" All the others were looking at me like "Seriously? All this because of a joke Speckles decided to play on mom?? Nice going Speckles! You made her stuff us in a container!"