You'd need something to attract the spark in that direction.
Excuse the vague philosophical style of question, but what actually /is/ an electrical spark then? I know that with a lighter spark it's really hot bits of flint, but I don't know how I should think of this. One really interesting thing I noticed with the spark I got from discharging the camera capacitor is that each 'bit' of the spark was travelling in a seemingly perfectly straight line from where it came from, so it was like straight beams of light going in every direction. I might upload a photo of it later cause it was pretty good! You say I'd need to attract a spark to make it go in a particular direction...does that mean something is already attracting the spark in all directions?
I'm not aware of TV or movie prop techs building EMP devices to take out an entire city block...
I thought we were past this. Why are you still taking what I'm saying out of context? At the beginning of the thread I was talking about EMPs, but now I'm talking about a little box that goes "vssst" and whether or not you can create sparks safely. I asked about controlling the direction in regards to that thing about a Pikachu cosplay I said, because if the spark fires in all directions it's going to shock the person wearing the costume and possibly even set fire to them.
I gave you an opportunity to deny it and you admitted you DID want to know so that's where we're at.
This is the only part about my back and forth with you that's actually bothering me. I'm purposefully not hiding my intentions because I'm keeping them entirely transparent. There's nothing I admitted to that I thought was a bad thing, and the "opportunity" you gave me was one I was not remotely interested in. I know you're going to want to start quoting me and saying stuff like "You said 'XYZ' and you DON'T think think that's a bad thing? Well sorry but that won't fly for me etc etc", but I'm telling you there's no point because the fact of the matter is you have taken your own interpretation of everything I've said, and you've given your own meaning to it. That doesn't make you right - it just means it makes sense to you. I do get where you're coming from in a sense, but at this point you basically won't answer anything I'm asking, even if it's something that would be useful knowledge across all sorts of electronics projects.
If I asked how I could safely use my Arduino kit to control a much more powerful high voltage circuit as well as the 3V one, you wouldn't even be prepared to tell me what a relay is, would you? You would withhold any answers to my question based on a literal interpretation you've taken of the hypothetical question I asked, even if that answer was simply telling me what a relay is and what it's used for (even though it's general electronic stuff). You'd do this all on the principle that I could misuse the information. What on Earth is the point in that when someone always replies before or after you with a straight answer to my question?! All it means is that you personally cannot be held accountable for anything I do (good or bad) with electronics, or in other words, you prefer not to be involved in what I'm doing. That's also your prerogative and I'm fine with it, but why then have you replied to me directly more than anyone here? IT MAKES NO SENSE.