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Is it a case of toying with the opponent or just picking up the Idiot Ball in a fight?
Either way, probably falls under Why Don't You Just Shoot Him?
I had a similar request (search for "MONSTER ROAR CLOSE TO FACE"), where the creature refrains doing its usual kill move because they face the protagonist. It's like Why Don't You Just Shoot Him? but for beasts who obviously wouldn't understand the concept. Could go to TLP.
I think what separates this from WDYJSH is especially clear in the Terminator films. There's no gloating, overly complex scheme, or practical advice not taken. The Terminator is a killing machine supposedly trying to kill John Connor and, rather than break limbs or compress his chest, throws him out of reach!
Sounds closer to Tactical Suicide Boss.
Sometimes part of Not Worth Killing
Aw heck. I remember reading a trope specifically about what the OP said. Something related to Punched Across the Room and Just Toying with Them, but not quite either.
AHA! It's Just Hit Him.
Edited by MetaFour
There has to be a trope where a creature or machine powerful enough to overpower or tear a person apart instead opts to throw them away. I can recall this behavior in Alien: Covenant, Terminator 3 and Salvation, and the latest Mummy.