I drive a big 4wd truck at work and it's my belief that the bigger and faster you are the more essential it is to drive (or cycle) courteously
a double buggy's larger than a CX bike but the CX bike is faster so maybe this guy was simply using your logic but too confused to work out what to do?
it's more likely he saw MF moving over so continued on his journey oblivious to his anxieties.

