The end of reality

The air shifts, the elevator doors open and Tommy falls backwards. With a yelp he lands on his back. He catches himself with his hands, but immediately screeches loudly
"Ew, what the fuck is that?!" The carpet is moist, almost wet "disgusting", he says pouting and wipes off his hands on his jeans. He looks around curiously.

Or, Tommy plays the elevator game and unbeknownst to him noclips into Level 0 of the Backrooms

Or, Tommy gets lost in a different dimension and everybody close to him goes after him, but they all get lost themselves