You keep hearing about them, but you never see one
First, you put the cricket on a box, tap the box, and you see that the cricket jumps away. Now, you cut his legs off, put him on a box, tap the box, and you'll see that the cricket does not jump away.
Sis boom baa Carnac
You hear about them but never see them
A: There have been sightings of UFOs.
You keep hearing about em but you never see em
