well, today i was jamming at some studio, and some interesting occurred. It seemed that something somewhere was not grounded, I'm the lead singer and lead guitarist of my band, so as i was playing guitar and singing, i accidentally brought my lips a little too close to the mic, and SNAP, static. It was bloody painful. A little too painful to be your ordinary static jolt. Upon further inpection and testing, this only occurred when my fingers were OFF the guitar strings. Also, when i touched the mic and strings at the same time, ignoring the uncomfortable feeling of flowing electricity, the amp gave off the same humming sound you get when you hold onto the jack. Can anyone give me an explanation?