Hi All, About a month ago I finally found and bought a certified fully loaded 15' MKS Ecoboost with then 15k miles. Now it's closer to 19k. The car is beautiful but over the last few weeks I think I discovered a problem with brakes. It's a weird one and I'm looking for some input from people who know these cars. Basically the brakes seem to be in perfect shape. There are no noises, no vibrations, nothing is wrong at any speed most of the time when driving normally. However when driven aggressively and fast I noticed that at some point I get some sort of thumping noise from the brakes and they feel like the rotors are warped. It happened 3 times so far but every time under the same conditions. I was driving fast on the highway with a lot of traffic and was using the brakes a lot. I'm talking about hard braking and acceleration several times in a row at highway speeds. First time it caught me by surprise but the other two times I tried to play with it. I discovered that when the problem starts I can press and release the brake and it will make the noise every time it's pressed. There's also a vibration going like if you have warped rotors. And it's loud. At that point If I let off the brake for 10 - 15 seconds, next time I'm braking everything is normal and smooth again. And the problem doesn't seem to come back untill the next time. It's almost like if the pads get to a specific temperature they just can't handle it if you know what I mean. And once they cool down a bit they are back to normal. I've never experienced this in a car before so I don't know if what I think is the actual reason. I would probably try replacing the pads with something more performance oriented but I don't know anything about the stock pads and I don't even know if this makes any sense so I don't want to start throwing money into it just yet. Any ideas?