Well it's still 120 pounds, but its the force that changes. It'd be putting like 1k Newtons onto it if you fell at like 40mph.
And I use my chest pocket now unless I'm wearing just a hoodie, then its the pants pocket. Also, don't put them i the same pocket, I did that and had a pretty bad fall, and my phone slammed into my nano and bent it right under the screen. Like it still worked, but the screen was cracked. It looked pretty fucking sick though, and I had a good story behind it.