Replacement of tower section
 

*Hanging* from the bottom of a 120-foot tower, no longer attached to
the ground but still suspended in mid-air:

https://www.arrl.org/news/features/1...1/3/w1aw-l.jpg

The levitating tower:

https://www.arrl.org/news/features/1...1/3/w1aw-h.jpg

Pictures in context:

https://www.arrl.org/news/features/1998/0901/3/

It seems vaguely possible to replace intermediate tower sections using
this method too...!

Tim N3QE