There are a few things you can do to mess someone’s car up without them knowing. One is to drive it into a tree. Another is to drive it into a wall. And another is to drive it into a ditch. But the best way to mess someone’s car up without them knowing is to just drive it around in circles. This will cause the car to start making strange noises and eventually the driver will realize that their car has been messed up and they’ll be able to fix it.
