Yea its pretty cool. He used to disappear by 1030 on the dot every night and come back out at 930 the next morning. Then a couple nights I worked later than usual so he waited up for dinner lol and now he buries himself at random times. I messed up his sleep schedule haha. And if it buries himself right when you put him in your tank don't worry about it they usually come out when they feel safe.