The film started with a man robbing a grocery store in America and he held up a woman shopping in the store (randomly using a chocolate bar off the shelf) and kidnapped her. The film then followed them in his car on a kind of road trip. They ended up falling for each other and even had sex in car while he was driving i remember. She turns out to be some officials daughter and he sends out police and helicopters etc to save her. When they catch up with them the woman says she wasn't kidnapped and the guy did nothing wrong etc.

Hope someone can help me as its been bugging me what the film's called and who is in it etc etc. I saw it on the BBC i think around 7 years ago.