Looking good! Cannot wait to see him change over time.
Behira, my ghost BI huffs and puffs sometimes when in shed if I have to move her, change her water, etc. She's all bluff, but it can be disconcerting, especially at almost 7 pounds now .
Yafe, my CP, is notorious for hissing and huffing when I go to pick him up AND I am bothering him or waking him up. I use the hook to let him know I am coming in the tank to get him and let him huff and puff at the hook instead of me. I've seen his teeth and even though he's a gentle soul, don't want to startle him.
Shayna (BP) will occasionally huff/hiss if she doesn't want to bothered as well.
I think many snakes will "bluff" like that. Yafe, Shayna, and Behira have never escalated things. I think it's their way of saying "I am vulnerable and leave me alone." When we call them on it, and they realize who we are, they calm down.