Back in the tube TV times, I knew some guy working at a TV shop who shot off half a thumb, because he touched a loaded capacitor in a TV that was just unplugged.
Don't underestimate the power of every day appliences.
Getting a few dozen volts straight through a nerve will make you feel weird things.
I also nearly killed myself with a giant DIY laden jar I thought was discharged. It was not. I discharged it across my arms (eg, across my heart). Luckily there was very little stored power, it hurt enough to give me pause but I wasn't injured. This thing was pretty big though, it definitely could've held enough power to hurt me badly.
Lessons learned!