Yeah he is a beaut. I think he was gripping on to the silicon and also pressing himself against the corner to get a better grip. They are by nature terrific and very quick climbers. He likes to sit in a ridge at the top of the enclosure now. I honestly have no idea, I thought the glass was sticky or something but I checked and its fine. But its such a long snake with so much surface area and so little weight, it probably can grip on to almost anything and stay.

Oh and I'm in Southeast Asia. Theyre native to this region so its not extremely rare but not an easy find either.