Dam. Just watched episode again. Very satisfying scenario (but very unlikely) that someone mentioned before is that Jessie was actually pulling everyone's strings all this time, that Jessie is some kind of evil genius, let everyone else do his dirty work.The reason he flipped out, gave all that money away etc was that he realized he had set all these events in motion himself, guilt was killing him etc..Walt goes back to get his money from gang,kills the whole gang in process, finds Jessie at the compound not expecting to find him there, lets Jessie go, Jessie kills Walt and gets away with the $$$.Very unlikely but so satisfying, seeing all the crap, beatings etc Jessie has endured since beginning..