if a 12-13 ft snake has your arms pinned,,your screwed,,bottom line,they kill thier prey,s a human is no different,,i believe it was an anaconda they tested on discovery,put sensors on a mans arm,then had the snake constrict his arm,and it came out as being the same pressure as a school bus being parked on him,,just to give an idea...also,,many experts in the field have said a large snake 16ft plus,could more then likely swallow a small child,,or midget i suppose,,and if it starts at the feet,,more then likely a small adult,,and here is a link,if you look at the fact box,,see what it says about baby,the burmese python,,so yes,over 20 ft is completely and easily obtainable


http://animals.nationalgeographic.co...se-python.html

and heres a pic the other night of my burm,,the hook on the bed next to him is 3ft long



here is one on holloween,,the burm helped me greet trick or treaters



and here is a friend of mine's green anacondas


the one with us holding it,is the small one,,the pic of just my hand is the big one