I was shown this technique on my conversion to 737-300 in 1998. It did not strike me as a difficult or particularly hazardous procedure in itself and certainly wasn't described as reaching the point where cabin crews and trolleys get airborne. Indeeed it was a pretty measured affair, not overly complicated and not needing any unusual degree of co-ordination between pilots. As demonstrated it seemed to work very well indeed. I was surprised to discover that Boeing subsequently removed it from the FCTM as it seemed a useful fallback 'just in case'.