Has any one else noticed that the same symbol appears on Stan’s machine and on Bill when he’s thinking about Stan? Considering that symbols mean EVERYTHING in gf (e.g. Mable being refered to as shooting star.)  it has to have some importance. Also notice how in bill the symbol seems to be shining brightly and how young Stan also appears on bill maybe he was created by Stan in the lab which has a machine that is shaped alot like Bill but upside down which is a image that has never appeared before. (edit: 1:inside bill it is also blurry when thinking about stan which is strange considering “He knows alot” almost like hes remembering and then when he sees the symbol his look turns to surprise. 2. when bill enters stans mind stan says in his sleep “im sorry”.)

(MEGA EDIT: its also stans tattoo) (BETTER MEGA EDIT:oh its just a worm hole )

Other mind blows:

1. Stan says” we got them all” or some thing, which makes me think about the RR cipher where Bill hints “there is a secret society in gravity falls”

2. Bill tell the kids their more clever than he thought especially the fat one. Another of Bill’s hints was “the handyman knows more than you think” 

3. Bill says buy gold. In “Boyz crazy” Stan warns robbie about the Apocalypse and tells him he should have gold.

4.Dippers new room was youngstan’s old room and it was his carpet 

also WHY THE HELL DID STANS HAT CHANGE IN THE MIDDLE OF THE SEASON  (COUGH COUGH CLONE)