Because most professional wrestling promotions have a timeline going back to 1948 (the year of the founding of the National Wrestling Alliance) but few companies that are even nearly that old openly admit to ever having been members of said alliance (everything before Hulk Hogan's rise to fame in 1984 is remembered in Broad Strokes in the WWF) and because literally hundreds of "angles" (stories) have been dramatized during the pay-per-view era alone, and finally because of the Seven-Year Rule, one will encounter references to events that seem like Noodle Incidents if one has been watching WWE or TNA programming for only a few months or years.
Chief among them is the notorious "Katie Vick" incident of 2002.note If you've mercifully never seen it: Kane was accused by Triple H of having killed his girlfriend Katie Vick years in a car accident years before. Hunter followed this up by showing some "security camera footage" of himself, wearing Kane's mask, committing necrophilia with Kate's corpse in her coffin. The punchline was him throwing some noodles at the camera while saying "I screwed your brains out!" The episode ends with an enraged Kane throwing HHH in his car trunk and driving off, but not before viewers could easily see the trunk flying open as the camera was fading out. Fans and the media universally hated the angle, and it was quickly blown off at the beginning of the next episode. Also qualifies as an Old Shame for everyone involved. This will be brought up from time to time, but never fully explained - partly because it's funny to do so, but primarily because since WWE programming is now rated TV-PG, even discussing that infamous episode is pushing it now.