A friend of mine sent me a video he took of the ending of that song (how bad of him!) when he saw the show and you can see that it's a platform she's standing on. However, it's hard to believe that they would put Idina in such peril as to make her balance on a platform that small with nothing keeping her planted there...
In the original preview runs of AIDA in Chicago, the "star-cross'd lovers" in the tomb were raised up and out of sight, versus the Broadway version where the black screens enveloped them in the center; the reason being that the contraption in Chicago broke and Pascal and Headley fell out of it onto the stage--luckily, Pascal, being the hero that he is, broke her fall.
You think people would learn: SAFETY FIRST. It's immaculate watching her raise up so high, but it makes me so nervous to think that she could fall...
whatever and ever amen - ben folds five