Me and a few friends decided to break a record, so we made big boomz on
my friend's private server. As far as I've seen, the biggest one was 10,000 TNT

http://www.youtube.com/watch?v=tpYxJB0JCYk

Yeah, 28,800 TNT total. We built it by hand, and
it crashed the server. It took around 4 or 5 hours to do total, and the
explosion took around 2 hours to render.

If you're wondering why
"Player" detonated it, it was so that no one saw the particle effect of
the explosion, so no one would lag that badly.

The explosion totaled 1.5 kilotons if my math is right, although Minecraft physics aren't very realistic.

Cast:
Tablecloth- Pit digger, Builder, Server owner
Moonlaugh (Me)- Pit digger, Builder, Video editor
Katananana- Cameraman
Taterlord- Builder, Comedic relief
Macrinus- Builder who left halfway through
Player (also Tablecloth)- Detonator