Mine would be arbitrarily slowing down a character to maintain horror in a game. I get if there are reasons like age, injury, or location that could provide context, but don't turn my legs into molasses because you need to time the jump scare just right.
I'm a fan of games that put an expiration date on consumables, or letting me know that the items I have are low level next to the ones I'll get later (e.g. if I get a Small Potion of Healing I know there's probably gonna be large ones later). That sort of thing gets rid of the FOMO from using the consumables right away.