A skateboarder getting ready to perform on a half-tube rink where there are trees in the background.
Two horse chase after a man holding a carrot.
The subject is either a skateboarder or two horses and cannot be both at the same time.  The subject is either performing on a half-tube rink or chasing after a man and cannot do both.
ONE SKATEBOARDER IS NOT THE SAME AS TWO HORSES. GETTING READY TO PERFORM IS NOT THE SAME AS CHASING.
A man can't be a skateboarder getting ready to perform and also a man being chased holding a carrot.