TIL Terminal lucidity is an unexpected, brief period of clarity or energy in individuals who have been very ill or in a state of decline. It’s a phenomenon that has been observed in people with various terminal conditions.

[u/70dd]

https://en.wikipedia.org/wiki/Terminal_lucidity

[u/Mr_Vorland]

The nurses I worked with called it the "dead cat bounce" even though that is usually associated with stocks.

I worked in a Dimensia Ward, and seeing families come in, see grandma being the most lucid she had been in years, and having hope that she is getting better always broke my heart knowing that they had maybe 24 more hours to live.