Hey everyone... I've got a problem brewing with my brakes. When it gets really hot out I have found that when I brake my car stops but the pedal will slowly get pushed down to the floor in order for me to be kept at a stop. once the pedal hits the floor the car stays at a stop. I was wondering if anyone knows what is going on and is it safe to drive the car. I can't get it to the shop until tues. and I have to take it on a 200 mile round trip this weekend. I was told it could be the master cylinder and that just doesn't sound good. Do you guys think it's safe to drive?