sentence: A young man and a young boy showcase martial arts and tumbling skills on a street sidewalk surrounded by a large crowd of people as a nearby drummer accompanies them. sentence:   The man throws some mock kicks at the boy while the boy tumbles in somersaults in response. sentence:   The boy and man walk forward together using their hands only. sentence:   The boy and man continue to tumble and somersault ending in an eventual hand shake at which point the boy leaves and the man walks over to the drummer.