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Even better if the foe was already almost dead. When you slap something for huge numbers it's also fun having the DM describe the wreckage that's left of your opponents.
I feel like some Table Top games are more prone to this than others, just based off watching some different IP's being played.
I do a thing where if someone lands a critical hit that takes a character from alive to dead*, they get a more descriptive kill based on the type of attack. A slashing attack might behead them. A cold attack could freeze them solid.
It's Pathfinder 1e, so death is when negative HP >= constitution score (not bonus.) I don't do it if they have room for bleedout and stabilization.
I like that a lot - it makes the crits feel more epic and unique.