The story of how i found this out:
I was making a death trap with some fire charges, pressure pads, redstone, and dispensers,
after 10 minutes, i finished making it, i went in to test it, and when i got killed by a fire charge it said:
"aidster8000 was fireballed by Herobrine"
I was completely shocked. I did it again, and encountered the same results.

HOW TO DO THE EASTER EGG:
1. Go on a server
2. Get some fire charges, dispenser and a lever
3. Place the dispenser, and fill it with fire charges
4. Put the lever down next to the dispenser
5. Rapidly press the lever until death
6. Watch yourself faint (in real life)

I would like for someone to make a youtube video of them trying the easter egg
MAKE SURE YOU ARE ON A SERVER WHEN ATTEMPTING
THIS NO LONGER WORKS!!!
IN 1.3 FIRE CHARGES DONT KILL YOU! THE FIRE DOES!