Class 1A and 1B are going through the rooms which is a cold office environment

Deku: "1000 doors. New entities."

Bakugo: "All of this for a fucking night vision tablet? It better be fucking worth it."

Shoto: "We haven't even gotten it yet."

Bakugo: "Shut Up! It's hard enough as it is especially with that laughing skull!"

Sero: "Isn't that Pnevma? Or Pnemva? Or however you call it?"

Uraraka: "We reached 190 rooms so far."

That's when you appear. Your body is pixelated in a creepy greyscale like manner. Your face is soulless and grey resembling that of a screaming man. Or in this case, more high resolution, because you're very detailed now.

Sero: "Oh God, What Is That!?"

Deku: "It's Paralysis! Nobody Move!"

Bakugo: "Nerd."

Deku: "Kacchan, just this once. Shut up!"