Stuck outside, how to unlock car doors

Hacks to Unlock Vehicle Doors - Do they work? - Hacked Gadgets

There are tons of hacks floating around the net these days that claim you can open vehicle doors using various methods. I haven’t tried any of them, and I am skeptical of most of them. I am sure that most of them use some tricks like a second person manning a second key fob, pressing it at the right moment.