There I am loving my iPhone. Talking and surfing. Talking and emailing. Then the fun starts to diminish. Talk, surf, crash. It's like a snowball going down hill, getting worse and worse. It's more like just talk, and crash.
Thinking it's a mini OS X, I figure there's got to be a "Force quit" or heck just a reset. Sure enough:
Force Quit: Press and hold the "Home" button for six seconds with that app being displayed. IE., if you're staring at a Safari screen and nothing is happening. Just press and hold the Home button.
Hard Reset: This is the one that stopped my "snowball".