Concertigrossi's plotbunny meme

I will list out some my fandoms. You, dear reader, give me the nub of the plot, a character and possibly a pairing (and/or a crossover), and I will tell you how it came about.

Example:

Firefly/Pirates of the Caribbean, Captain Jack Sparrow

The immortal Captain Jack needs a lift (while carrying some contraband, naturally) and happens to run across the Serenity. Mal agrees to take him where he needs to go. His appearance freaks River right the hell out (he's got a lot more memories than most, see); Simon can't stand him because he upsets his sister; Jayne and Mal are just annoyed by him; Book is intrigued; Zoe threatens death when he hits on her; Wash is all, "Why are you hitting on my wife, weirdo?"; Inara won't touch him with a 10-foot pole, and he very nearly talks Kaylee into bed.

Cracky ideas are highly likely. If I write "So-and-so gets a frontal lobotomy," that means you've hit TILT and I can't figure it out. For non-concurrent canons, I reserve the right to glom onto any common time-traveling trope, and may invoke the Highlander option.

Some of my fandoms:

Pirates of the Caribbean
Sandman
Good Omens
Discworld
Kindred the Embraced
Robin of Sherwood
Night watch (the books)
Pet shop of horrors
Norse myth
Neverwhere
Dr. Horrible's sing-along blog
Buffy the vampire slayer / Angel the series

Any takers?