Different reactions can come from photobombing
A photograph can be ruined by something as little as lightning not being great, camera lenses being dirty, and people passing by behind the object to be photographed. However, another kind of intrusion is called photobombing, which means someone is getting in the picture on purpose.
Whoever does the photobombing will always get a hoot, but there can be different reactions when one is photobombed. Are you the kind of person who would get annoyed and think the picture is ruined, or would you laugh at the result?