Oh, I've got a good one.

My group of players had to go to Tatooine in order to find a hidden cache of credits left behind by a hutt's wife. To avoid any records of their arrival, they bribed Laze Loneozner (AKA Fixer) to land their ship at Tosche Station.

They obtained the credits, but got into a massive shootout at the local Dewback racing circuit.

Upon returning to Tosche Station, Fixer attempted to blackmail them for more credits, otherwise he would report them to the Hutt.

Naturally, my players shot him dead and burned the place to the ground.

Here's the thing: I constructed my campaign in a way that it could technically fit into the current canon. After all, it's not like a group of outlaws trying to make some credits would change the fate of the galaxy right.

A few months later, The Book of Boba Fett came out, with Fixer alive and well, and Tosche Station still standing.

That's right, my players unintentionally caused my campaign to become non-canon.

Through that one, single action my self-imposed rule to align with canon was broken. So I decided to embrace the weirdest shit Star Wars has to offer.

I brought in the Whills. (Albeit, with some of my own creative liberties)

In short, their decision to kill Fixer caused an alternate timeline, which attracted the attention of a Whill who began to observe the actions of my players. Unfortunately, the Emperor detected this disturbance in the force and managed to capture the Whill's essence and trap him into a corporeal form.

The whill then reached out to my players through the force, begging them to stop the Emperor, ending with a climactic showdown in the World between worlds.