POV there’s a school shooting.
American: First time, European?
European: Yeah, you American?
American: No, not my first time.
POV there’s a school shooting.
American: First time, European?
European: Yeah, you American?
American: No, not my first time.
Listen up, you smooth-brained human. You posted something that is not very funny. So, basically, the joke is that school shootings are so common in America that Americans are used to them, while a European is shocked. It's dark humor about a serious issue, you know, like your brain's capacity.