I agree. That's actually what I asserted -- that the hand should have been found in the pyramid the first time Gabe got lost. He went to a museum with mummies before his second pyramid visit, so he could have taken it out, and a mummy could have *possibly* moved, responding to it.
Gabe: Did you see that?
Sari: See what?
Gabe: Its hand moved!
Sari: You're imagining things, Gabe.
Something like that would have been awesome and would have set the ending up to not be random. We should have just written this book ourselves. lol