Strange telescoping behavior

[Snagrio]

Hmm interesting observation! Maybe he's attracted to the heat produced by the lights?

By BP does something similar but under different circumstances - when it's dark in a room and I'm holding him he starts bizarrely reaching straight up for the ceiling and sometimes goes up so far that he falls backward a bit. He also doesn't do that behaviour in any other situation and I'm still trying to figure out the reason why.

Maybe? Since the heat pits would pick up the heat signature? Then again you don't typically see them reaching up towards bulbs shining into their enclosures.

You mentioning the craning in darkness made me remember he does that too, though again, usually when passing by isolated lighting.

No matter what angle I try to approach it, I can't really think of a real answer. Hunting? Privacy? Curiosity?