Justin Bieber almost knocks fan out

Justin Bieber left a fan with a bloody lip after throwing a punch at him while arriving at his concert in Barcelona. 

The incident was caught on camera, which shows Justin arriving to his show at the Palau Sant Jordi for the latest stop of his Purpose World Tour. Justin was in a chauffeur driven car with the window down as he arrived at the concert. 

An enthusiastic fan is seen reaching through the window of the car before Justin freaks out and throws a punch. 

Not condoning violence but maybe you shouldn't put your hands inside the car?