(WARNING!!! There's an UNCENSORED S-word at the 0:24 mark, and a bleeped S-word during the actual proposal. Search for "Grapevine Traffic Stop Turns Into Proposal." The proposal starts at 0:57.)
Why do guys do this? A man set it up with a cop to have his girlfriend pulled over so he could surprise her with a proposal. But when the cop told her the car had WARRANTS on it, she got really upset and started crying. The guy works as a dispatcher, so that's how he knew the officer.