I was an electrician for 10 years and I've seen some shit. Do not underestimate, even 'weak' voltages and amperages. I've seen a simple 20amp 120volt circuit cause temporary/local paralysis and heart arrhythmia in a coworker. I had a bad incident where I touched the capacitor leads in an outside parking lot light, it was a 277v/60a circuit but capacitors make shit much worse. Since I was touch the light fixture, I was grounded to it and the current glued to me the housing, currently flowing from the capacitor across my body into the pole. Luckily, I had a man on the ground watching out and he was able to drop the bucket of the truck a couple feet which broke me free. I had strange burns on my hand that took months to heal, and for the next week had a tough time moving my left arm and shoulder. It essentially made all my muscles tense up and seize. When I was being held by the current, I couldn't move, couldn't breathe, couldn't even think to realize what was happening. So I can imagine some aging, drifting caps in an amp doing some damage, even though n an amp might only be 120v. Electricity can be a real son of a bitch. Did some power plant work for a bit too and the stories of dudes who lost their lives on the job there can be like straight from a horror film.