Like Duane McDowell says, it can be done but as for Orchids....
I'd guess it is possible but only if you get the conditions just right. I'm supposing that if this Lady is not pulling your leg (so to speak) that she perhaps keeps them in the dark warm conditions to encourage it to shoot forth new leaves to seek out the light.
The Root itself (again a guess) would have to be incredibly healthy as what ever energy it has left in the root is going to be needed.
Interesting.... May give it a go one day, if for no other reason then to find out for sure.
....Or she's getting roots mixed up with Keikis