In this task, you're given a context passage, followed by a question that needs to be answered. Based on the paragraph, you must write unambiguous answers to the questions and your answer must refer to a specific phrase from the paragraph. If multiple answers seem to exist, write the answer that is the most plausible.

Okay so i was at my friend Kendra's house with my friend sam . We were playing around like always , and then Kendra pounced on me and her knee landed right on my ribs . At the moment i could not breathe and i was on the ground trying to mouth help me .
Question: Why could I not breathe ?
Because I just received an impact on my chest .