| I think the pane is longer than it appears and actually rests inside the wall on the floor - slot door style.
While everyone is watching the paper, the pane is slid into the wall above, moving a slot, previously hidden in the lower wall, up to where the paper is. The top of the slot would be a point, the rest of the slot either hemispheric or square. The sides of the glass flanking the slot would still be there to provide reflection on either side of the paper, furthering the illusion that the pane is still there. as he comes through, the slot is slid back into the lower wall.
* ___/\___
* = window | = pane ###### = slot (missing glass)
*** | ######
___________
___________ | |
1) ___________ 2) | | 3) | |
*********** | | | |
* * | | | |
* * *********** ***********
* * * * * *
* * * * * __/#\__ *
*********** * * *|#######|*
| __/#\__ | * __/#\__ * *|#######|*
||#######|| *********** ***********
||#######|| ||#######||
||#######|| ||#######||
Then just lower the pane back down. The "/#\" is where he stuck his finger through.
The key came from watching the glass rather than Criss. If he really stepped through it, it would have moved. The other clue is that the pane he steps through makes more noise than it should if it were as new as the window sill looks.
If you want to learn how a magician does it, watch the trick - not the magician. ;-) |