Olympic Opening Ceremony

[Ghoulish Delight]

Just re-watched it. You can definitely see some sort of frame underneath each one when they went to full extension, but I don't think there was ever an angle shown where you could say one way or another whether there were legs/feet.

And I wouldn't assume stops at full extension. Among other things, on some of the close shots you could see that they weren't perfectly aligned when fully extended, and were even wobbling a bit.