I had just fallen in a poacher's pit and saw an unfortunate generic high elf victim (plain clothes, not a Thalmor) along with a deer impaled on the spikes at the bottom. Wanting to "release" the victim from being impaled in the spikes eternally I raised him as an undead and then led him down the passage a bit and then thunderbolted him to ashes to release him.
On his death I was quite shocked to hear him say in a gravelly voice "Thank youuuu". I hadn' t heard another raised dead say anything apart from "must kill", or "ughhh" or similar to that so the timing for this new saying was just perfect.
(Did the same for the deer but it just stared at me with black eyes until it became ashes)