A 14-year-old stole his grandfather's car near Salt Lake City on Saturday, then led police on a high-speed chase through a residential neighborhood.  At one point, he even sped through a PARK where kids were playing.


Luckily, someone in a huge Dodge Ram pick-up truck decided to do something about it . . . and stopped him by intentionally crashing into his car head-on.  There's a video of it on YouTube.  Luckily, no one was hurt.