Seriously, you guys are too high strung. Although I guess growing up with a Mother like mine will steel your nerves for you...I grew up with two cats, a cage full of gerbils(OK, just shut up about it), and a 7 1/2" Black Rat snake. As soon as I saw the camera geting close to the head, I knew the camera guy was getting fucked up.
Beautiful big guy, though, I couldn't make out markings, so I'm guessing Anaconda? Little large for python, and they've got distinctive markings...
EDIT, nevermind, it's a python. Never seen one with marking that dull before, but the head shape says it all. Notthat it was visible very long...