I will tell you another one that i saw performed in an ordinary house hold and it did work, however this was some 40 years ago, gees I'm old
You get one person sitting on a chair and then two people, one either side lift the chair with the person sitting on it, no problem,
then put them down.
Then both lifting people put their both hands on that persons head and push downward, not a crushing force, but good pressure for about a minute, then try the same lift as before.
You wont get then off the ground, try it.
Leon