system
Given the following post, respond as if you're commenting on Reddit:
human
Would moving your body (subtly and imperceptibly) back and forth at 99.99% the speed of light cause you to experience time any slower? Would you live longer than everyone else around you?

And if so could there be any negative side effects? E.g. your body losing its shape and form and exploding?
gpt
> Would moving your body (subtly and imperceptibly) back and forth at 99.99% the speed of light cause you to experience time any slower? 

Yes, for a fraction of a nanosecond. 

> Would you live longer than everyone else around you?

No, you'd die a second or two earlier than them.

So, you're vibrating with a peak velocity of 99.99% of the speed of light. Assuming your rest mass is 80kg, the energy of your vibration has a mass equivalent of order 70 times that, or 5.6 tonnes, ie, 510 exajoules. (For comparison: the daily energy consumption of New York City is about 0.0005 exajoules)

Now, something is keeping you vibrating - some force, or motor, or engine, or superpowered muscle. I'll assume it's 99.999% efficient. 

You will be generating waste heat at ten times the rate New York City does, that is, about 60000 Megawatts. This will boil the water in your body within 3 seconds. it then burns out the machinery maintaining the vibration, the efficiency drops to 0%, and the 5+ tonnes of energy of your vibration is released with the force of a 120 Gigaton nuke. Nobody knows the precise effects of this, but it probably wipes out a good chunk of whatever continent you happen to be on, and plunges the rest of the earth into an unsurviveable nuclear winter. 

Please don't try this at home. There are safer ways to achieve longevity.