"I don't know where I am!" This is your brain on drugs, kids.
Was it just me or was Jerry looking for the entrance to the Black Lodge? Saw some sycamore trees...but maybe not those trees
Maybe he was in one the lodges and thought he was high
I almost died of laughter when he threw the "I think I'm high". What a performance! I love the dysfunctional Horne brothers relationship a lot more in this season than in the previous ones, mainly because Ben has seem reform himself and Jerry kinda gave up on the bullshit and went to relax with weed. All this I find a lot better than managing the One Eyed Jack's which leads to schoolgirls being recruited to go into forced heroin and prostitution.
I think Jerry was munching on some of the local mushrooms.