In the crowd, a boy in his late teens explained in a loud whisper, "She's not under the sheet now.  When they put the sheet over her, she went down through a trap door.  That's just a light framework, doesn't weigh as much as the sheet.  And in a minute he'll flip the sheet away and while he does, the framework will collapse and disappear.  It's just a gimmick - anybody could do it,"