I was driving my dumptruck up the road one day, and happened to glance down, to see about the middle six inches of a snake hanging down from the wires beneath the dash. Now, only seeing the middle six inches meant I really had no idea how much more there was at either end.
It wasn't really a good spot to pull over, so I gave it some thought, as we were cruising along--The truck was kept in a yard in a rural area, and I'd picked it up the day before, and made two round trips from the job to the yard, before taking it home with me for the night, which was not in a rural area, therefore, he must've been in there at least a whole day and night, and another half day, and about 75 miles of driving already. I figured that if he'd been happy that long, he wasn't likely to be too upset by the balance of the trip back to the job, so I just left him alone.
Once I got back to the job, we started poking at him to try and get him out. He retreated even further under the dash. He got all the way up on top of the glove box, so I emptied it, and removed it from the dashboard. He started going the other way, and once I could see his head beneath the dash, I grabbed him by the tail, through the door of the glove box. Eventually, I'm standing there at the pasenger door, with his tail, coming out of the glove box, in my hand, while his head is all the way out the driver's door. I let him go, and he slithered out onto the ground.
He turned out to be about a five foot long black rat snake, which are common here, and pretty even-tempered. The guy working with me put him in a five gallon bucket, and took him home, to help with rodent control in his back yard...