this experience happened once... in my face... and i don't want it to happen again... i was doing my homework that time... long ago... and my guitar was in front of me... i was alone in our house... when suddenly, my guitar did strummed on itself... i was not afraid at first... but then i came to realize that... what was that? i got really confused... well, the wind can't strum the guitar... it's way to weak... i cant reallly explain it how it strummed on its own... it was then that i got afraid... then i get my guitar... strummed as loud as i could... and played it as loud as i could... phew...