Among sports photographers. There are a joke about "the refs butt".
The reason for this joke. Is that when you shoot sports. You often get unwanted "items" between yourself as a photographer. And the object you want to get in the picture. Which means that you end up getting something totally different than what you had in mind.
The photo of the ref is taking while the caretakers are fixing an issue with the Plexiglas. Obviously the ref didn't like to wait for that.