In Thor - The Dark World we see Thor's hand cut off by
Loki.
There is a tiny bit of blood, but the stump on his arm doesn't really seem to bleed. Is this some trait of Asgardians? Or just the directors keeping the movie a bit less graphic?
I'm assuming it's not because (big spoiler)
the whole cutting off the hand thing was an illusion by Loki, because he still would need it to look real to convince Malekith.
Image: warning - graphic