I read this on Reddit earlier today. I knew of this block, but I didn't know why it happened. Very cool.
“We are missing Satoshi, and now the blockchain is missing 1 Satoshi, for all time”
-miner claiming 49.99999999 block reward, instead of 50.
May 17th, 2011.
https://mempool.space/block/0000000000004c78956f8643262f3622acf22486b120421f893c0553702ba7b5
Discussion
There are several interesting blocks with lore. My two favorites:
225,430 - March 2013 accidental fork
74,638 - Value Overflow Incident