Discord was a powerful, but bored, mischief maker looking for a way to create some excitement — what he found was Lyra, a unicorn more than slightly obsessed with the mythical creature known as a human; this led to them meeting Joey.
Joey, who spent years trying to get home after a freak accident tore him from his body and thrust him into the lives of others in various dimensions; then, when he finally did get home, one Lina Inverse accidentally collapsed multiple realities together to create an amalgamated world where he found himself trapped with someone who wanted him dead… only to have a powerful being tear him from it and thrust him into a strange land full of intelligent ponies moments after a terrible battle.
Come and horse around, because when you mustang around Equestria it can really stirrup the emotions.
(…or something.)
Alternate title: QSE: Why You Shouldn't Horse Around With A Ninja
This is an alternate ending to a trilogy of stories, the first two are unfinished and the third [currently] unpublished:
1) Quantum Scrambled Eggs
2) Quantum Scrambled Eggs — One Year Later
3) Quantum Unscrambled Eggs
I'm trying to hone that amazing skill some professional writers have: the ability to write stories that continue on but don't require you to have read previous books... so don't worry about reading them unless you want to.
4677207 Because she sat on a bench one time.
4677421
I really liked the story Anthropology (and a few others) and thought it was an interesting characteristic/quirk; plus, as pointed out, there is the actual 'evidence' of Lyra sitting human-like (at least) one ep:
img2.wikia.nocookie.net/__cb20130126131634/mlp/images/thumb/b/bb/Lyra_Heartstrings_sitting_on_a_bench_like_a_human_S01E07.png/640px-Lyra_Heartstrings_sitting_on_a_bench_like_a_human_S01E07.png
All in all, I think it's an interesting bit of fannon.
4677651
Meh, I don't like it, the fanon thing I mean.
That's great!
It would be a crappy world if everyone had the exact same likes and dislikes.
(You'd never come across any really mind-blowingly good story.)
I know she sits like that, but, that's not really, human, is it?
Well... I've been known to slouch on the couch on occasion, probably coming close; the animators probably chose the pose (rather than a 'more human' one) so that her head wouldn't be towering over the pony next to her.