OP, might want to hide the owners phone number. Good luck with that. Maybe pick up some mice and see if you can coax it out.
I think @ShortytheFirefighter 's default suggestion is most appropriate. If you are not aware, it includes a container of gasoline (87 will do) and a fresh road flare.
@Sjogun, I think that one earned it's "Priority: 1" rating on the ticket, hope your boss gave you the rest of the day off
HA! I saw the first pic and thought this was a joke that the service writer was playing on you... Nope! That is f'in ridiculous in more ways than one, but hilarious.
I guess if it was me what I would of done is left it alone and put out a heater pad on low on the seat. It gets cold enough out now that he would have come out on his own when it cooled down and moved to the heating pad. But glad you got him out
The most I have ever taken out of a car was a dead owl in front of the condenser, but a live snake!!!
Someone posted your story... http://oppositelock.jalopnik.com/subaru-owner-has-massive-python-under-dash-1641325990