I once built a better mousetrap that would make the world a more humane place because it didn't hurt the mice.
It looked like two metal arms with curved hands at the end of each. You put the cheese into one of the hands, set the trigger, and when the mouse comes for the cheese, the other hand snaps down trapping the mouse safely inside. I'm still waiting for the world to beat a path to my door.
I called it a clap trap and anybody whose read many of my answers will know that I'm no stranger to claptrap.