On: Interstellar space even weirder than expected, NAS...

[grumpy8]

Not OP, but if you inspect the overlay, just right next to it there's a <script> with a closeOverlay function. OP probably tried to inspect/delete DOM element and found that function.

[rogueSkib → grumpy8]

Haha, yep, this. I hide a lot, but couldn't get scrolling to work, searched for "scroll" and stumbled on that obviously named method :)