The Book " Never can say good bye " possible to post a pic ?

[Hopeless]

Hallo,
i became my Never can say good bye book and i took a fast look....at page 58 and 74 we see Michael before ?? 25 years on stage.
In the background at the top there was something i also saw in the TII movie...a transparent big thing...i have no idea what it was.
It was absolut the same,but there was so much innovation in technics that it was nearly impossible that it was still the same....
I don't find that pic to post .
Here a ...not so good quality ....video :
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You can see this big transparent thing from beginning , very good at 0:13
What is it And the same around 25 years ago ?? :shock:
Funny was too that he had nearly the same light spots on his black pant at TII and on the pic from.....i don't know, long time ago, i think 25 years.
Confusion....

[voiceforthesilent]

I'm not familiar with stage equipment but it looks like either lights or maybe sound equipment?