Puffing from BP? [Not hiss]

[CCBaer]

I have a 900 gram male and he occasionally makes the puffing sound you described when he is climbing on me. It’s almost like a sigh. I’ve had him for a year and he has done it since the day I got him. He might do it once in a handling session or several times, it just depends on how much he is exerting himself at the time.

This is what I think it is - or hope it is. Plus, like I said his tank is fine. He doesn't make noise on his own when he's just laying down, chilling, only when he's climbing around, exerting himself. I hear it every once in a while when he's moving/climbing on my shoulder/neck.

Knowing that other snakes do this makes me feel better, thank you!