I've had my headlight washers do the same thing twice. Both times it was in the same area, parking garage. I know it didn't know where it was, but just the fact that the automatic light feature came on. However, it only sprayed once. Instead of the normal two times when you press the windshield wash.
Also, on another note. I have taken the bumper off, to put in HID high beams and change the low beams to match in color temp with the high beams. What I am getting at, is the fact that the head light washers them self's are forced out by the pressure of the washer fluid. So they are not motorized, and if you have seen them come out, via the shadow. Then yes they did spray.
KOT