Cell

Artist Clay Riddell abandons his wife Sharon and son Johnny to fulfill his dream of publishing a graphic novel. A year later, at Boston International Airport, Clay calls his family on his cell phone with good news about his new career. His battery dies, so he calls using a payphone. An electronic signal (later dubbed "the pulse") is broadcast across mobile networks worldwide, turning cell phone users into rabid killers. Clay witnesses two planes colliding midair and flees into a subway station. One of the planes crashes and destroys the terminal. Clay meets survivors in a subway car. Train conductor Tom McCourt reveals that the power is out, the train cannot move and the station will flood within hours due to the pumps being shut down. Tom then suggests abandoning the train and traveling through the tunnels. Clay agrees and, joined by a third man, attempts to escape the airport.