I think that if you have a snake that is never handled & never exposed to unfamiliar areas & things, they'll likely be more spooked by moving or any other changes. They certainly don't stay in one spot in the wild- they learn their way around, even if they don't go that far from where they hide. I'm not above changing up my snake's homes & it seems to make it more interesting to them- to explore & move around more. So I agree Neko_snake- how you raised him likely helped.