Premise: A black teenager sitting on a blue bike is at the top of a BMX ramp observing another youth, in a red shirt, who is sailing into the air with a bike, single-handed, while performing a stunt, presumably from the ramps.

Hypothesis: Two teenagers at an indoor bmx park.
Relation: neutral

Hypothesis: A person watching as another person does a trick.
Relation: entailment

Hypothesis: A black teenager standing on a trampoline.
Relation: contradiction