A giant, white shipping container has dropped in the middle of The Rocks and it's freaking Sydneysiders out.
Which, yes, sounds ridiculous BUT if you go inside the box - an art installation called Séance - you'll be plugged into headphones, plunged into darkness and made to feel like you're about to fall into Sydney Harbour.
The 15-minute sensory experience has been described as "disorienting" and "deeply unsettling", with some participants admitting that they had to take their headset off halfway through.
Séance has come to Sydney after a time in Melbourne and runs three sessions an hour between 11am and 10pm every day.
It is only open until December 10, though, so there's not much time left.
Tickets cost $20 and you can grab them here.