Someone with physical access to your car could cut the brake line.
However, this does not mean there is still air in the brake lines.
Then he showed me the brake lines: one for each hand to control steering and stopping.
The next week, the bus's brake lines were cut and its stop sign was damaged.
Did you ever notice that your brake lines don't resemble a straight line at all?
But when your brake line was cut, I knew it had to be more than that.
In the next three minutes, over California, temperatures shot up on the fourth and fifth brake lines.
If so, chances are you have air in your brake lines.
Water can actually cause air to accumulate in your brake lines.
The brake lines were cut, so it'll roll the other way if we put some muscle into it.