El desconocido

Carlos, a bank executive, begins his typical everyday morning taking the kids to school. No sooner has he started the car than he receives a call from a person who, despite being a complete stranger to Carlos, turns out to know absolutely everything about him. The voice tells him there's a bomb under his seat and that he's only got a few hours to gather very large sum of money. Either that, or his car will be blown to pieces. (San Sebastian International Film Festival)