There's a cosmic ray (possibly a proton) that was observed in Utah, it is known as the "Oh-My-God particle". The reason it's called that is because of the severe amount of energy, it has (1020 eV) roughly 50 Joules of energy, that's about as much as a baseball moving at 100km/h, DONE BY A SINGLE PROTON. To put this in perspective, if a 1 kg object was moving as fast as this proton, it would have enough energy to completely destroy the moon, it would be the equivalent of 1,000,000 magnitude 9.1 earthquakes, more energy than the entire human race has used in 2011, 100,000,000 times over.
If you're shocked by a low-current tesla coil, you won't feel any electrical shock! This is because the tesla coil changes current direction faster than your nerves can detect. So you won't feel any pain until a few hours after the shock, when your body starts noticing burns in your tissue.