Steering wheel and brake pedal locked up while I was driving and the car stopped

I think , MAYBE , the order in which those things happened , might be reversed?? Doesn't make it any better though. I believe the car stalled , then when (by the engine stalling) you lost the power assist , then after 2-3 pumps of the brake pedal , you lost vacuum assist with the brakes. Did the car start back up? What is it doing now? Best chance of finding out WHY it stalled , is for the symptom to be duplicated (preferably NOT while driving out on the road though!) , and tested. good luck.