There are revolving doors, and there are trap doors

Boston Globe: After 105 years, BSO to enter a new stage. I’ll be interested to see if there is any audible difference (there will certainly be a difference in the appearance of the floor). I find it interesting that there is so much care taken to reproduce the exact stage floor down to the nails used; certainly Carnegie Hall is a cautionary example, but I don’t think anyone is proposing filling in the sub-stage area with cement. But it’s good to know (albeit a little scary) that the BSO doesn’t know what the stage trap door is for, either…