(^Cred to: Saya) Will any of you try this? Maybe this Halloween? I'm thinking about trying it next week when I will have access to an office elevator very early in the morning. Good chance on the conditions being right. I heard that if you manage to successfully get there, the only way back is to reverse the order of buttons pushed (without having gotten off the elevator). But you can still get a peek out the door. Be sure to write down the reverse button sequence because you'll probably only have one shot at getting back. And remember to get off on the same floor you were on when you started the ritual.
Pfft, amateurs! just take it to the highest floor and jump out the nearest window. That's how I got to this world.