If you go online and look up “Bad Metaphors or Similes,” here are a few examples you’re likely to find:
The young fighter had a hungry look, the kind you get from not eating for a while.
The red brick wall was the color of a brick-red Crayola crayon.
He was as tall as a six-foot-three-inch tree.
What makes these so comically terrible? For one, they each violate the blueprint of a good joke: recognizable set up, a moment of tension, then a hard right turn. With the examples above, the turn, rather than being poetic or descriptive, is blunt and obvious- a U-Turn.