Started my LC Sunday morning to go to the shop. I back it in at night so I can pull straight out in the morning,anyway,pulled out of my drive and went to the end of my street and went to hit the brakes and heard a thunk then the pedaal went to the floor and stuck. My first reaction made me yank the ebrake hard and come screeching to a halt. Needless to say the house at that stop sign has three local police officers that live there. I got out and opened the hood and the ******* master cylinder had fell off the brake booster. I very carefully drove it back to the house(using hand brake) Mounted the master cylinder,tried the brakes and now I have no power assist. I called my local Toyota dealer that I get my parts from and it was $580 something my cost. I'm a mechanic so I get jobber prices. WOW, I think I may start a thread on a aftermarket booster install. I'm real good at making CNC plates so I may retrofit to a GM or Ford booster. What was funny is the master cylinder never made noise or pedal travel never changed.