I got an 86, my TRON costume got lost in the wash :(

It is not a Tesla coil, they are voltage multipliers. They take incoming AC
( http://en.wikipedia.org/wiki/Alternating_current )
and turn it into very high voltage DC
( http://en.wikipedia.org/wiki/Direct_current )
they are probably Cockcroft-Walton generators
( http://en.wikipedia.org/wiki/Cockcroft-Walton_generator ).
The single tower (the round one) shown on Dark Roasted Blend is a Marx Generator
( http://www.electricstuff.co.uk/marxgen.htm )

They are all very cool and I want one (a big one)!

Hey, I would really really like an invite.

Thanks!