An authority-figure in a white helmet , wearing a yellow vest , and sitting on a yellow motorcycle .
Chances are slight that a police officer is sitting on his motorcycle and trying to keep the crowd from getting out of hand .
Chances are slight that a police officer is sitting on his motorcycle and trying to keep the crowd from getting out of hand .
There is a very good chance that a police officer is sitting on his motorcycle and trying to keep the crowd from getting out of hand .
A police officer is sitting on his motorcycle and trying to keep the crowd from getting out of hand .