My 2 year old girl does that all the time, it's perfectly normal. He could be curious about what's going on outside or it's just how he likes to situate himself. They don't always curl up completely, especially if they're more comfortable/confident in their enclosures. I will note though, if he's holding his head in a strike position (like a tight S shape), he might be feeling defensive and/or still hungry. Just make sure you're feeding the right size with right frequency, your husbandry is good, all that. And he should be fine![]()