2. Being made fun of.
Narcissists have no sense of humor. Nada. None. Zero. Zip. They may laugh cruelly at you when you fall and break your arm, and they may chuckle at the discomfort of someone else (since they have almost no empathy), especially if the discomfort was caused by them (because remember, to them you are not a real person but an object), but they are completely incapable of ever laughing at themselves.
A few years ago on a forum I posted on, there was a man who became enraged when someone wrote “LOL” at a joke someone else made at his expense (the joke wasn’t very offensive), and from then on he gave both of them the silent treatment. They take themselves very, very seriously and are very, very sensitive. But that sensitivity doesn’t extend toward anyone but themselves. The reason they are so bothered by jokes at their expense and can’t laugh at themselves is because the self they present to the world is a false one that must be propped up and supported at all times by everyone else. To poke fun at a narcissist is to poke fun at a self that’s as empty inside as a puppet. It has no substance. It will fall to pieces and then the narcissist is forced to confront that terrifying emptiness that constantly haunts them.