Premise: Two guys are doing back flips using some kind of equipment on their feet.

Hypothesis: Two guys are practicing for the circus and doing back flips using some kind of equipment on their feet.
Relation: neutral

Hypothesis: Two girls are doing back flips using some kind of equipment on their feet.
Relation: contradiction

Hypothesis: Two males are using some kind of equipment on their feet to do back flips.
Relation: entailment