premise1: Two boys are watching another boy perform a jump on his BMX bike.
premise2: Three people on bikes on a dirty hill, one is in the air.
premise3: Bikers enjoying the landscape in the desert.
premise4: A person gets air on a bike.
premise: Two boys are watching another boy perform a jump on his BMX bike. Three people on bikes on a dirty hill, one is in the air. Bikers enjoying the landscape in the desert. A person gets air on a bike.
hypothesis: Man performs a trick in the air.