This has happened definately two, maybe three times, in the past year and randomly. I start the car, put it in drive and I have no brakes. One time I can remember it was after changing the brake pads so I figured I didn't pump it up properly and dismissed it. But the other time(s) the car was simply parked and I start it and nothing. Afterwords I pump, and switch the car on and off (don't know which of those actually fixed it) and all was good. This never happens when driving, master has all fluid, and no leaks under the car. Any thoughts besides the brake booster being bad?