Well I hope yours works when you build one! :)
And can you post a picture of your marx generator if you build one?
To let you know, all of the photos that has a few sparks in a single picture are 4 second long exposures.
I hope you enjoyed this instructable, and enjoy the photos down below! And the video I just uploaded!
Comment if you need help, have question, or anything! I like comments!
(UPDATE) I just uploaded a video of my marx generator working, sorry for the poor quality with no sounds, I had used my crappy camera. :(