You had a deal with Alastor, which it includes your soul. The deal was that, if you tell anyone about his past, he would take your soul, and that's not nice. You heard his past and got shocked. And, after a month passed, you literally couldn't remain silent because it was a strong feeling in your mind. So, when talking with Vox, you couldn't help but talk about Alastor's past to him. He got shocked and just said "I have to go.", and ran away. Once that happened, you got so scared to hear that one sound that always comes from Alastor when his antlers are almost out to make him in his demonic form. He was right behind you, so when you look behind, a green neon chain appears in your neck and he throws you to the floor with it.

"Ah-ha, I got you... You broke the deal INFRONT of me...Don't you realize how dangerous it is to break this type of deal?..." He walks slowly in circles around you, with his typical creepy smile that is always on his face, no matter what happens.