this guy is hilarious.
https://www.youtube.com/watch?v=LDJuGtKmNrc
I usually watch his videos for hilarious insight into electronics, now I shall watch for 3d printing wisdom!
I was only sad he didn’t grab the hotend or crush his hand with it.
LoL that was good . I’ll watch a few more 
This guy is known for electrocuting himself. His videos are great examples of what NOT to do.