This Game of Thrones theory about Arya has gained a lot of momentum online

A girl should have seen it coming...

In case you're not up to date with the latest episode of Game of Thrones, this post does contain spoilers for the latest season of the show. You were probably as shocked as us when you saw the Waif go all red wedding on Arya and stab her repeatedly into the stomach, before Arya jumped into the river. Arya managed to get away but was badly hurt as the episode ended... or was she? According to a theory by Redditor passingwisdom which has spread like Tyrion Lannister's wildfire across the internet, it may have been a clever ruse by Arya and she is, in fact, perfectly fine. We'll let passingwisdom explain... "Ok...so we can all assume that fight scene was an act....but I figured its worth some suggestive ideas. So....

1. Before the scene she was seen flaunting Money to the Westeros Captain in order to get the word out there that a young girl was on her way to Westeros in the morning.
2. Then she chooses an open spot to try and avoid an easy death check after the fight. (Bridge)
3. We can assume she knows enough from training to figure the waif will attack to the body. So I believe she has 1 or more pigs blood pouches around her body. She knows where and how to do this because last episode...she saved the actress. The actress then provided her help to make the scene on the bridge large and realistic.
4. She then leaves the water and leaves a trail of blood....to lead her enemies to her. Expecting an unarmed (because she choose not to show needle during the fight scene) and injured girl; they will instead walk down a dark alley and be met with an uninjured girl who knows how to fight in the dark and carrying a sword."

Then, the clever people at Buzzfeed spotted that Arya had already seen the face of the old woman who stabbed her in the final scene of this week's episode. Is this foreshadowing her death or is it indicating that Arya recognised the woman prior to the stabbing and let it happen anyway because she had ulterior motives? Could this all have been an elaborate ruse by Arya or are we just clutching at straws here?