The man is riding a skateboard.
The man is on the street.
The car is behind the man.
The man is wearing a helmet.
The man is wearing elbow pads.
The man is wearing gloves.
The man is wearing knee pads.
The man is wearing shorts.
a skateboarder in street
The man is skateboarding. 
man on a skateboard
a man wearing a helmet skateboarding down a road in the middle of a street