all the Sanses and others are suddenly teleported to a large movie theater, they looked confused, shocked

Nightmare: “what the- where are we!? Why they are Sanses…plus Gaster here!”

said in annoyed tone and confuse

Dream: “I-I don’t know…Ink you know?”

Ink: “don’t know too! Maybe Error did?”

Error: “HEy WhY m3!"

Gaster look confused too and other too thinking why they are here even? Sanses, Papyrus’s, Gaster’s look around them to found out why, how and who teleport them here?