Some here are so drunk with love....
Actually, the way it works on the iPhone is:
1. You run in the dark, with the flashlight on.
2. Your phone rings.
3. Your flashlight goes off as soon as the phone rings, plunging you into darkness.
4. You screech to a halt, so you don't trip and kill yourself in the dark.
5. You answer your call.
6. You tell the caller to hold on for a minute, because you are in total darkness.
7. You press the Home button.
8. You scroll through your screens of icons, in the dark, looking for the Flashlight app.
9. You turn on the Flashlight.
10. You talk.
11. When you want to hang up, you press the Home button.
12. The Flashlight goes off, plunging you into darkness.
13. You click on the Phone app and hang up, in the dark.
14. You scroll through your screens of icons for the Flashlight app, in the dark.
15. You turn on your Flashlight and continue running.
It's pretty much the same if you want to make an outgoing call.
And it's pretty much the same if you want to change a song or a podcast.
Oh, and if you want to text, or do anything with a another app, you also have to do it in the dark.
And that's why I take my old Galaxy Nexus when I go running, and leave my iPhone at home.
Silly boy, indeed....