I had to do this.
Dipper had just finished watching the Summer of Steven trailer.
"In the Words of Wendy. I'm going to stare at a blank wall for a few hours and rethink everything."
Hours later...
Mabel came in to join him.
"What do you need to stare at a blank wall for?" Dipper asked.
"I just saw the Star vs the Forces of Evil Season two trailer." She explained.
"Oh. Yeah."
So for hours they stood there.