If someone covered in blood, distressed, approached you in the street asking you escort them away from an attacker, you'd do your best for them wouldn't you without asking too many questions straight away? I see this as the same.
Faced with the same snap decision I'd do the same, not many of us drive with our doors locked, the guy is already in the car, you may as well pull off then ask questions once your away from the immediate 'apparent' danger.
But Re:OP - Yes a very odd commute indeed, something to tell the grandkids!