A boy is holding onto and running along with a merry-go-round .
A boy is lying on the middle of a merry-go-round while his mother spins it .
A boy is holding onto and running along with a merry-go-round.
A boy is lying on the middle of a merry-go-round while his mother spins it.
The boy could not be running while he is lying down.
The boy could not be running while he is lying down .