2) A dragon actually picking up a giant, NPC, or anything else for that matter and flying up then dropping them. This was seen in the E3 presentation.
3) A horse rearing back on two legs and... naying? This was seen in the E3 presentation.
I haven't seen any of these... have you?
EDIT~~~~
2 and 3 are in the game 1 was just an animation added in the trailer.