I have a three year old anaconda that is only 6 feet. I would put a towel over the glass for a while to try to stop him from striking it. One of our labyrinths use to strike the glass constantly when we first got him and messed his face up. But he calmed down over time. I wouldnt count on him calming down after hes warmed up if anything he will probably be more snappy. Put one of your shirts in his cage so he knows your smell. Dont try to handle him for a while let him get used to where hes at and warmed up. And then start handling him everyday even if its only for a couple of minutes. And dont try to stuff him with food either. I know hes hungry but if hes been starved and you feed him to much or to big of prey items he may regurge them. Hes a gorgeous boy and IM sure he will calm down after a couple of months in a new home that cares for him properly. Congrats on the pick up! BUrms make the world better lol