你一枪砰了我却说是枪走火
[nĭ yī qiāng pēng le wŏ què shuō shì qiāng zŏu huŏ]
It means a person getting injured or metaphorically harmed by someone and blaming the incident on an accident. The netizen may be implying that they were wronged but are trying to remain understanding or forgiving.