The teacher is amazed...
He tries to wipe off "I AM" above, but simultaneously "HERE" below also disappears.
Then he tries to wipe off "HERE" below, but another mysterious thing happens:
as soon as he touches the board below the fabric, the board acts suddenly like a liquid mirror,
creating ripples all across, while reflecting his face on the board.

Now watching his own reflection, he stretches his hand towards the ripples.
But as soon as his fingers touch the board, they disappear, going straight through it.
He pulls back his hand and leans toward the zero dot, to have a closer look:
"Would it be possible to pass through it...?" he thinks.
He leans further and further forward, till his nose touches the ripples, and then his full head disappears into the liquid surface on the board.
But as soon as his head disappears into the ripples, his very own head reappears from there, simultaneously coming out from the same place on the board, looking into the same room:
(The audience is on the "other side" of the blackboard. Gradually they will see ripples appearing, then his head coming through the ripples)
"Wow, where am I? In the same room? Strange. Is it the same place?... in the future?... or maybe in the past?..." he asks himself, amazed by what is happening, while asking himself at the same time the same question on the other side of the board. (When his head is facing the audience, the projection will make 180 deg turn, to end up in the same position, facing the audience.)
Then he pulls his head back from the mysterious surface that enabled him to take a look below the fabric, while asking himself, totally confused:
"Where is this place?... or was?... Here?... When?... Now?"
Suddenly he gets an idea.
He draws quickly a co-ordinate system above the space-time fabric, and writes some texts on the board,
and while doing that,
everything he does, appears simultaneously in parallel, below the space-time fabric.