A man in a white shirt sings into a microphone as he reads the words on a screen , while a balding man plays the drums .
It is impossible that a two man band is singing the Gun 's 'n ' roses classic `` Knocking on heaven 's door '' at a karaoke bar .
It is impossible that a two man band is singing the Gun 's 'n ' roses classic `` Knocking on heaven 's door '' at a karaoke bar .
It is certain that a two man band is singing the Gun 's 'n ' roses classic `` Knocking on heaven 's door '' at a karaoke bar .
A two man band is singing the Gun 's 'n ' roses classic `` Knocking on heaven 's door '' at a karaoke bar .