They are playing frisbee.
He threw the frisbee
This man is excited
Man throwing a frisbee
The man wearing a red cap
The man wearing a red shirt
The man wearing gray shorts
The grass is green and recently cut
people running around the park 
people playing frisbee in the park 
frisbee game in the grass 
man throwing Frisbee
people playing a game of frisbee in a grassy field