Next time she calls you a shrimp, send her this link. (That wont save you but send it to her anyway.)
The Mantis Shrimp has a far gentler name than it is gentle. In fact, it could punch a hole in you and your mother. IF you and your mother were crabs.
With a punch the velocity of a .22 caliber pistol, creating enough friction to boil the water it touches it's safe to say you'd get your arse beat. IF you were a crab.
