The water was very murkey. I don't know how the rescuer could have known for certain he was reaching through a window. Most likely he was mistaken. If the car had filled up like it did in the mythbusters video, then there should not have been any bubbles. Were there any bubbles in the mythbusters video?
I have studied the Bible and the theology behind Christianity for many years. I have been to many churches. I have walked the depth and the breadth of the religion and, as a result of this, I have a lot of bullshit to scrape off the bottom of my shoes. ~Ziploc Surprise