That would definitely be worse 
I could hardly believe this myself when I heard it, first hand, from my director friend the other day:
He and another friend were out driving somewhere and they stopped at a store for something. My friend (the driver) waited in the car while the other got out and went inside and did his stuff. When he came back out to the parking lot, he opened the passenger side door and got in, announcing, "okay, I'm all set now!" The driver looked over in a state of alarm, which was probably nothing compared with what the friend felt as he realized he had gotten into the wrong car.
Everyone was lucky that day. No one freaked out or pulled a gun or anything. Bumbling apologies were made and the situation was quickly if shakily rectified.
But ..... I can't even imagine. Can't. Even. Imagine.