Keep your mouth shut and you'll never get caught.
He was caught taking Polaroids.
Hodor! Hodor!
The eyes, cause they di-late.
When his lips are shut.
Ventriloquists have to be able to speak with their mouths closed. Politicians speak out of both sides of their mouths simultaneously.
An elephant rolling down a hill with a daisy in its mouth!
A football net!
Because Tom had previously drowned in the well and everyone said "Tom is sleeping with the fishes."