This guy has got the voltage so high and the current so low that he's getting gaseous streams..

Up the frequency until it goes invisible, stick a segmented surface ie a single wind coil in or near the stream, and the voltage should multiply..

High Voltage

Anyone who wants to stick their hand in these streams (bodkins) should feel safe enough putting their family pet (or a goldfish) in the stream first..

Thinking of building a tesla coil and running it from imhotep coil, and spark gap...

Looks fun.