Board Thread:Questions and Answers/@comment-61668-20160806162337/@comment-61022-20160809182516

If it's the arc that I think it is (I have to double check, at Community connect right now so I don't have my comics on hand..) but if it's the point in time I'm thinking, I believe at the time Thor (in his own title) was off on some quest across time and space, and some spell or something was pulling him away to Earth to get in the middle of Avengers missions and then returned moments later from the moment of his disappearance in the Thor title with no knowledge of what happened until much later.

It was basically a means of not disrupting continuity between the two titles so the writers could have their cake and eat it too.