A friend of mine had his brand new iPhone 4 snatched on the subway here a few weeks back. It's a real eye opener. You just hold it out there. If you aren't read

A friend of mine had his brand new iPhone 4 snatched on the subway here a few weeks back. It's a real eye opener. You just hold it out there. If you aren't ready for someone to take it, it's trivial to grab it out of your hands and jump out of the doors while they close.