Reach out and scorch someone - lifelines - turn off cell phones before entering an area with an explosive atmosphere - Brief Article

Vibrant Life, Jan-Feb, 2004

An employee on an offshore drilling rig received second-degree burns the moment he answered his cell phone. Another man suffered injuries when fumes ignited as he was talking on his mobile phone while pumping gas into his vehicle.

There's enough power contained in a standard cell phone to spark an explosion if you're in the immediate vicinity of volatile fumes. Many mobile phone makers warn of the danger in their user handbooks.

To protect yourself and those around you, turn off your cell phone before entering any area with a potentially explosive atmosphere, such as gas or coal storage facilities, service stations, and areas below deck on boats.

(U.S. Department of Labor, Mine Safety, and Health Administration)