Inspired by the parents home phone number

1. Who has an emergency phone number registered on their mobile that you've put there just in case you get found injured in a ditch or summat and whoever finds you needs a number to call?

2. If you had to go through someone's phone to find a number to call, how would you find one to pick?

2 anecdotes:
My friend Dan from uni once accidentally set of the emergency text message facility on his phone while he was on holiday. The message said something like: "I have been kidnapped or am in danger. Please call the police." and got sent to a few of his close friends. Everyone flipped out and he wasn't able to put things to rest right away because he was on holiday. What a plonker.

My mate John got a call from someone at a club , on the phone of a guy he was seeing saying that the guy was parasitically drunk and covered in sick and that my friend should come and pick him up.

Emergency phone calls!