premise1: An extreme mountain biker making a leap across rough terrain in the woods.
premise2: The BMX rider wearing a black helmet gets air off of a jump.
premise3: A guy flipped over upside down on a bicycle.
premise4: A biker jumping extremely high.
premise: An extreme mountain biker making a leap across rough terrain in the woods. The BMX rider wearing a black helmet gets air off of a jump. A guy flipped over upside down on a bicycle. A biker jumping extremely high.
hypothesis: A man does a trick.