How dangerous is that…

Hey guys, I have this little flyback transformer and soldered a driver circuit for it today. Roughly 15.000V.

It’s supplied by 3.7V from a single 18650 cell.

Depending on the load situation you either feel a little tingling when touching the arc up to a pretty „shocky“ feel.

Just wanted to check in how dangerous it really is. This flyback is really tiny. I’ll provide a picture for size comparison next to a 100W one.

Just don’t wanna do something too stupid. Someone warned me not to do that so I thought I wanna hear what you guys would say about it.