Gravity Falls reacts to...

Open up your Eyes

Mabel "So is anyone going to explain what's going on here or what?"

Shinshinjane "Later Mabel, we just need to let this cool down for a while.

Mabel "Fine."

Shinshinjane turns back to everyone else. "This is a song that Bill Cipher would sing to Dipper."

Bill and Dipper "Wait, what?"

Play the video

Mable "FREE THE WINGED UNICORN!!!"

Robbie "What happened to that horse thing?"

Soos "Ouch. That had to hurt."

Gideon "Sweet sugar berry."

Mable "That poor unicorn."

Wendy "And that bear thing is huge."

Pacifica "I can understand her loneliness."

McGucket "What a horrifying experience."

Neither Stan or Ford spoke, but felt very bad of their actions for what they had did to each other. That abandonment feeling is what they had both been feeling for thirty years.

After watching the video.

Bill "She's right. I would sing this at Pine Tree."

Dipper "Bill, I want to know. What made you to become like this?"

Bill didn't speak, but after a few moments later he finally spoke "It's not something I like to talk about, Pine Tree."

But that only made Dipper even more curious about Bill's past even more. And judging by the lyrics of the song it must held deep scares on Bill.