I have a 4 m.o. ball python and i had the top to his tub off to let out some humidity, he was chilling on top of a hide for 10 minutes straight, not moving. I looked away for 30 seconds and he was out of the viv and on his way to adventure! I picked him up and tutted at him before putting him back. It's crazy how fast and how clever they can be when they put their mind to going somewhere new!