Paul tells the crowd at the temple of his conversion. The crowd listens attentively through the assertion that Jesus is alive and is Lord, but condemn him when he claims God sent him to the Gentiles. The Roman officer sets him up for "questioning" (flogging), but Paul makes his Roman citizenship known and they back off.
How this is about Jesus / Application
Paul takes any opportunity to talk about Jesus, even when a riotous mob is out for his blood thinking wrongly that he took a Gentile into the temple. He takes little thought or effort for defending himself, but has a laser focus on bringing attention to the person of Jesus, even when his life is in danger.