A street musician sitting playing guitar with an open case and a sign reading `` TELL ME WHY MY MUSIC SUCKS '' .
It is impossible that a street musician is playing guitar and singing at the same time .
Chances are about even that a street musician is playing guitar and singing at the same time .
It is impossible that a street musician is playing guitar and singing at the same time .
A street musician is playing guitar and singing at the same time .