premise1: An extreme bicyclist is performing a jump with his bicycle and rotating the bicycle while he is in the air.
premise2: A man does a bicycle trick on a concrete obstacle.
premise3: Person doing a trick bike move in a skatepark.
premise4: A man doing tricks on a BMX bike
premise: An extreme bicyclist is performing a jump with his bicycle and rotating the bicycle while he is in the air. A man does a bicycle trick on a concrete obstacle. Person doing a trick bike move in a skatepark. A man doing tricks on a BMX bike
hypothesis: A boy performs a stunt.