Big mistake (Bill cipher x Dipper)

Why?

Dipper sat there rereading the note. He read it agian, and agian, and agian. Was it a joke? No, it couldn't be. Mable? No, yesterday Mable was asleep. A million possibilities ran through Dipper's mind. He looked at the clock again 4:01. He looked out the window. The woods were lit up with a bright blue color. It faded then lit up again. Dipper threw on some clothes and queitly ran down to the woodside. He stopped took a deep breath gripped the edge of his shirt, and walked into the woods. He walked a while looking left and right for anything mystical or magical.

~about a hour later~

Dipper has been walking for what he thinks is about a hour. He looks to his right to see a bright ball of blue light. "Ahhhh" Dipper screamed as the ball grew brighter. "Pine tree get up that's just weak" "B-B-Bill" Dipper responded rubbing his eyes. He vision was restored, he say Bill in front of him. Bill extended his hand to help get Dipper of the ground. "Bill you're alive!" "Yes, I am you're really smart aren't you?" "How are you a dude" "had to pull a few strings to return" "what kind of stings" "ohh you know I have to stay in this body unless I'm in a body or mind" "what else" "Wow pine tree trust issues?" "Well last time you tried to enslave my detention!" "Fair point" " Stop beating around the bush Bill!" "Fine! You kill all the fun! I still have my powers and I'm only allowed in this universe and the mind scape". Dipper stood there trying to process all this information. "WHY?!"