If this happened to me I wouldn't be an idiot like this guy

I'd wait for the next subway to come, hope it doesn't crush my sweet precious iPhone, and then jump down to get it as soon as the train pulls off. Gotta use common sense, right? via Valleywag

Idiot jumps onto subway tracks to save iPhone [Geeks Gone Wild]

via Valleywag by Mary Jane Irwin on 1/4/08

Bijan Rezvani dropped his iPhone on the subway tracks in New York City. Instead of contacting the transit authorities like a sane person, he braved oncoming trains, the electric third rail, and plague rats to jump down and snatch it. His exuse? "I needed my phone, so... I got it." Even though we call it the Jesusphone, people, it's not going to save your life.