Shaggy had brought a dog, Scooby

Velma: Shaggy, that dog is big and brown, which is the opposite of Fred's little white dog- starts remembering things

Shaggy: Uh... Velma? Are you okay?

Fred: Yeah, you don't look well.

Velma: starts to panic, seeing visions of her past self I NEED SOME AIR!! runs outside

Scooby: looks at her worriedly, but suddenly his eyes turn black with large pupils

When Velma comes out, she keeps seeing things from before until she hears an older man's voice ?: I didn't think it would happen so fast... it's getting worse. Scooby is behind her on his hind legs with his mouth full of blood and human remains. Now he's much bigger than Velma...

Scooby: I can't understand why you keep remembering... We solved so many mysteries together. It was simple, fun, but you started questioning... and suddenly... the fun was over. So I took everything that was left and rebuilt it. I rebuilt the world, and we went back to our classic adventures. But you started remembering, again, and again, and again. I just want what we once had... Ah, but it doesn't matter. I'll make it right next time. ......

Velma gets scared and tries to run, but it's like she's stuck in place. Scoody: Please don't run... I don't like chasing.