Agreed that he looks hungry, my BP always assumes that position when he'd expecting a mealEven though he's most likely not being defensive though you'll want to be careful about reaching in to the enclosure when he's like that as he might mistake your hand from food. Definitely follow Redshepard's advice if you do want to handle him when he's in that state.
Imo BP bites (especially young ones) are some of the least painful among all the common pets. Their teeth are like tiny, very sharp needles so they make very clean, tiny cuts and after you wash the cuts you can barely see or feel the injury. In a day you will not remember it's there. Getting scratched by a cat causes more damage than a BP could ever do.
Healthy growing BPs will be voracious eaters and never seem to be full(stick to a weekly feeding schedule though to avoid overfeeding). It's a great sign that he seems to be an eager feeder, the worst thing is to have a BP that refuses food.