Sorcerers Apprentice
Hero
This is a game mechanic, not a story mechanic. It's about challenging the players to think fast, not necessarily about adding tension to the story.Is the NPC doing this or is there any in-game manifestation?
If not then, nope. You the GM should not be a mechanic in your own right.
If there is an actual time facet going on in the game, let the gzmeceorld do what it does.
As soon as **you** become part of the story, it's going in the wrong firection.