I want to strangle my sister!

She texted me today asking if I'd received an email from her. So I checked my inbox, and indeed there was a link to a clip of Loki in The Avengers. I watched it, and it was great, but I was kind of angry about having had such a good scene spoiled. Anyway, I replied to my sister with, "LOL, loved the last line."

And she was like, "Oh, I didn't watch it because I didn't want to spoil the movie."

...

WTF???