I was moving my car in a gas station parking lot and went to stop the car to go in reverse and the breaks went to the floor and I pushed them about five times and still no breaks. I hit a concrete column and air bags didn't deploy and the airbag lights were blinking on and off and speedometer needle was going crazy. Officer went to assist with moving the car to a curbside and in neutral the car was trying to go forward then when it was put in park it continued to try to go forward. We were not on a hill, it was flat in the parking lot. If this would have happened on the main roads my son, nephew and myself could have been hurt and if I had hit someone else they could have been hurt as well. I know have a adjusting checking the vehicle and a mechanics shop as well. Before this happened I had absolutely no warning.