Because in the TV series The Falcon and the Winter Soldier, Don Cheadle is in the role of his recurring Marvel character, James "Rhodey" Rhodes / War Machine, with only a very short time.
Specifically: 98 seconds, writes Deadline.
In a clip, Don Cheadle's character has a brief conversation with Sam Wilson, played by Anthony Mackie, about the legacy of Captain America.
In another clip, he has no dialogue at all, but is only briefly seen in the picture.
On Twitter, the actor comments on his nomination, in the category Best Male Guest Actor, somewhat questioningly and writes, among other things: "I do not really understand it either".
This is not the first time nominations - and even prizes - have been awarded to actors who have only appeared for a few minutes in the film or TV series.
A well-known example is Judy Dench, who won an Oscar in 1998 for her role in Shakespeare in love - even though she is only in the film for 8 minutes.
In her speech of thanks, she commented on the fact and said: "I should only get a part of him", referring to the statuette.