Ditto-- even though a light bulb socket seems like an interesting (and fitting) place to stick your finger, doing so is not wise;
I omitted the coil and just used a pair of tweezers. I believe it disappeared. I certainly never saw it again but I didn't see much of anything for a while after the flash.-- 10 turns of 24 AWG wire wrapped around a kitchen knife and plugged into the wall socket does not make a good electromagnet (but the sparks are pretty);
I had a peanut butter jar in the hole, to hold the gas. No beating but I'm pretty sure we got grounded.-- igniting copious amounts of gasoline poured in a hole dug in your backyard, while entertaining, generally gets you a beating;
Pretty amazing, overall. I did so many things that could have killed me.Somehow, I survived.