Do you drive? Check your front, check your rear, and check your sides. Get out of your vehicle to check if you have to. Beware of blind spots, especially in crowded places and around kids or elderly!
Very Lucky! But we can not depend on luck every time. Being aware of your surrounding and environment is the key.
First of all the bus seems to be at the wrong side of the road; considering it has stopped there to pick up school-kids from the walkway. The bus driver could have checked his side and rear view mirrors for oncoming vehicle before he went for the switch to open the bus-door. Although kids forgot to look on both sides, they were subconsciously drawn towards the bus, once it stopped there and started to open the door. Had the bus-door not opened, (it was possible) the kids wouldn’t have attempted to cross the road. Not sure though:(