OK, I'm sure this is not what you were thinking, but it is odd. There was a Russian researcher who accidentally stuck his head into a particle accelerator in 1978. Here's all the details. But the interesting thing to me is what was noted in this paragraph:
"Needless to say he didn’t develop Super Powers like in the comic books and didn’t die. The dividing line of his life goes down the middle of his face: the right side has aged, while the left froze 19 years ago. When he concentrates, he wrinkles only half his forehead."So, if you don't mind your skin falling off over a period of two years and the development of seizures, you could "freeze" your whole body from aging by jumping into an atomic particle accelerator. Then, again, you could die... but that would freeze you in time (you wouldn't age another day), as well. Just a thought.