Tesla coils and their support equipment are extremely dangerous.There are many known and unknown dangers associated with this type of equipment. "Some" of the known dangers are as follows:
High Voltages and Currents, Burns, Long Distance Arcing, Strong Electromagnetic Fields, Ozone, Ultraviolet Light, X-rays, Fire, Explosions, Radio Frequency Interference and Electronic Equipment Damage.
In addition, photographs showing people standing under a shower of sparks are either faked or done under very special circumstances. Tesla's own notes reveal that the famous picture of him sitting under one of his operating coils was a double exposure.
Get the complete safety story at Terry Fritz's site: http://hot-streamer.com/TeslaCoils/Safety/safety.htm
Coil #3 550 Watts
Coil built by Dennis from Hopkington, Mass.
My twin brother Bernie also constructs coils ...
Here are two great Tesla coil links:
The Turn Of The Century Electrotherapy Museum
A Narration of a Tesla Lecture Apparatus:
Combination Cylindrical / Pancake Coils