I was playing my Jaguar unplugged today and played a little melody on the higher frets. I noticed the notes wouldnt stop ringing- it was feedback kind of sound. I thought it was really unsual, and kept experimenting. I found that its definitely the string vibrating: if I mute it with my palm, it stops. if i take my fretting hand off of the note however, it doesnt, and the note rings out for a while.