An older man wearing glasses , a baseball cap , a white shirt and a red vest plays a tuba outside a building .
It is impossible that an old man stands on his head as he attempts to play an instrument .
It is impossible that an old man stands on his head as he attempts to play an instrument .
It is probable that an old man stands on his head as he attempts to play an instrument .
An old man stands on his head as he attempts to play an instrument .