Completely normal. Happens all the time. My plane was delayed this week because of an unruly passenger on the plane before mine at the gate. My plane had to be diverted into another state while they sorted him out. The day after I landed, I was walking to get something to eat, and there was a bum fight at the road entrance of a Target. They had a disagreement about who could panhandle there. On the way home, some guy climbed the fence and got on the runway. They don't know who he is though, he was sucked through the engine of a plane.
https://www.theguardian.com/us-news/2026/may/09/frontier-air...
Anyone who says this stuff isn't normal in America doesn't get out much apparently. Living in the US is nuts.