Sorry in advance for the annoying music. Does anyone know what Tesla coils are actually for? We see them in all museums, and Tesla said it was his greatest invention, so he must have had better and bigger plans for them than 'useful for special effects in Hollywood movies'.

https://blossom.primal.net/3ebe586a44c3df68bf78812ee477c873a21c31da168fc02cba13512c37b716a4.mp4