The subject of this sentence is subject, predicate and object. This sentence, the subject is a carriage, the predicate is hit, and the object runs over him, so it is not a sick sentence.
This sentence comes from Yin Wen's article published on WeChat official account 2017-1-2619: 24. The sentence is complete: a carriage knocked him down and ran over him. His hat can't be found and his matches are lost. I don't know where seven pence went.