If the hide-behind has never been seen, how does the journal have a picture of it?
footprints look like wrenches
Dipper's captions:
Manly Dan - lumberjack / punching enthusiast
Lazy Susan - waitress / smells like onions
Grunkle Stan - great uncle / mediocre boss
The people in this town are literally the dumbest people in the world. Literally.
Stan is obviously trying to keep Dipper from discovering the secrets of Gravity Falls. Maybe Soos isn't the only one who acts dumb to hide some secrets.
tree with huge dent
When Dipper concludes the episode, we see a tree with a huge dent in it. It's a wonder the tree hasn't fallen over.