... are they stuck?
They're very, very poorly made.
Kind of an obscure Transformers gag... there are certain Transformers with "kibble," bits of the vehicle mode that just hang off 'em. Some Transformers go way overboard, like a penguin transformer that was basically a robot with some big clunky penguin parts that hung off it. In this case, they just floomphed out of the vehicle mode like manjuu souffle.
I like how Marisakkuri is all, "aw, lame."
You could have found a picture of a truck with no person inside, but it seems that effort is not your middle name.
The crappy MSPaint editing job is part of the joke. Also, the new Optimus has a person inside his truck, so nyeeh.