It's been quite awhile since I continued with my series Homer Nods ("and yet I also become annoyed whenever the great Homer nods off" Horace, Ars Poetica).
These blunders are best and most fun for the rest of us when made by really great players. Here's an excellent example:
White has just played Kc7-d8, threatening mate, and Black, a recent World Championship Candidate, resigned.
I'll bet it will only take you a minute to see what he should have done instead. If you do, you can say that at least this once you were sharper than the Grandmaster.