Not GPS, but I found myself waking up in the back seat of a car when some friends and I had driven all night to catch a Violent Femmes concert in Pittsburgh. The sun was coming up and they hadn't found our motel. This was in the days of printed MapQuest directions.

I asked "Did you follow the directions from where they started?"

They said "We don't need to start from there, we've already been there!"

I said, "Let me fuggin drive."

So I get behind the wheel and start back tracking to the previously established starting point while they say over and over that we don't need to start from there, they already know that spot, they just need to drive around a little longer and they'll get there eventually.

And then I followed the directions, to the letter, from the starting point on the directions, right straight to the motel.

So the moral of the story is always follow the directions and don't try to improv that shit, because you'll find yourself lost in Pittsburgh.

Also, holy shit, Pittsburgh is laid out on a triangle rather than a rectangular grid, and that will throw you right the fuck off your sense of direction if you're not familiar, which none of us were.