Yep. Absolutely normal. Around our house, we call it being perfect! "Hello Mr. Sir, are you perfect???!!!" They do it when they are at just the right temp and want to stay that way.
Mirage came out of brumation on April 26. He was doing great. On May 2 he started acting funny. We just redid his tank, and he keeps going into one of his hides. He just lays there. He shows no intrest in food. HELP!