Ignoramus27736 wrote:
Made a 1/4" spark gap... I see sparks... Very exciting...

http://igor.chudov.com/projects/High.../Franceformer/

i

This is somewhat related, since it involves a sign transformer.
flames conduct electricity:

http://www.panix.com/~presence/fesrg...fr34342134.jpg

On the left is a propane tank connected to one 7500v leg of a 15kV
transformer, and the right lead attached to the other 7500V leg.