I was idling along looking at a house for sale the other day and decided to come to a stop while going downhill. With the pedal all the way down the X still moved forward a good 5 feet making all kinds of noise up underneath that sounded like it was sliding on gravel, but there's no freakin way at the speed i was moving. Do the brakes suck and not grip when there's some force being put on them? The one time i've had to slam on the brakes the ABS would kick in but it would slide and do this gravel crunching noise for a lot longer than necessary. Any ideas?