What is this person doing?
Answer the question succinctly with one word or a brief phrase.

skateboarding

Where is this?

skate park

Why doesn't he have ski poles?

skateboarding

Is this an arena?

yes

Are the bars metal?

yes

What kind of surface is this vehicle traveling across?

stairs

What is the girl in the Red Hat doing?

watching

Are most of the spectator seats filled?

yes

What color are the wheels?

white

What is the sport?

skateboarding

How many people are watching?

20