If you ask it outright, "The truck in the image appears to be carrying portable toilets, also known as portable restrooms or porta-potties. These are commonly used at outdoor events, construction sites, and other locations where permanent restroom facilities are not available."

Using google lens with the tick marks on the image provide lots and lots of training examples that could work for that via simple pre-training and pattern matching.

In this specific image case there are even games on Baamboozle called "what is going to happen"

The answer is similar to the previous explanation.

I expect LLMs to be good at retrieval so it would be more interesting for images that weren't in the corpus.