Letting out A LOT of air?

[Eric Alan]

Huh really? Even if he doesn't open his mouth or anything and it's coming from his nose?

Yep! Just like that. The sound you hear is air coming through their nostrils.

[Jerk]

Yep! Just like that. The sound you hear is air coming through their nostrils.

Huh weird..well I am glad it is not a sign of him getting sick!
Thanks everyone for the information!

[O'Mathghamhna]

That's basically the sound I'm referring to. Kind of like an "I'm annoyed and I'm going to let you know, but I'm not annoyed enough to really do anything about it right now" sound. It's different than a warning hiss, but still I'd call it a hiss.

Haha... It's the BP way of saying, "Not tonight, I have a headache..."

ALSO: I've read that snakes can also push air out of their vents when irritated? Like anger farts?