Two men in black shirts do handstands on a stage .
It is highly unlikely that two men in black shirts do handstands on a stage as onlookers pass by .
It is probable that two men in black shirts do handstands on a stage as onlookers pass by .
It is highly unlikely that two men in black shirts do handstands on a stage as onlookers pass by .
Two men in black shirts do handstands on a stage as onlookers pass by .