Driving
While they were driving to the Chick-Fil-A where Henry was working that day, they never would have expected what was about to happen later. It was just a normal car ride for them at first, they drove off from their house, the baby was laughing in the back and the mother was just enjoying the ride.
When they pulled into the Chick-Fil-A parking lot, this is when everything would take a turn for the worst. Nobody saw what was coming next and the last person on earth anyone would think would get involved would be Henry. The mother parked her car and then the incident happened.