If I understand it correctly, it may be a garden path sentence. The usual construction of a garden path sentence is where a sentence, when read, the part of speech for a word is different than immediately considered.

The old man the boats.

Here it seems when considered a word at a time that the old man.... Oh wait "man" is not the subject of the sentence, "Old" is not an adjective.

I don't know if there's a name for it as a literary technique, but it's an example of Implied Subject in grammar. In English, we almost always used an implied subject in imperative sentences, but that page offers examples of many other situations we use it, too.

Coming off of this discussion, what you have there might be an extreme version of diazeugma, one with an implicit subject.

Either way, I learnt something new today - zeugma. So thank you :)

Edit: I just realised.. please, no juvenile jokes about "sugma" in this thread, thank you.