Like most illusions and abstract art, this trick can be poorly or expertly performed. And also like an magician or painter, the real genius is in the mastery of their control... in this case, vocal control. Again: It takes great vocal control to suspend support with complete control of how much and when... and when to bring support and power back in.
Check out this example of de-constructing technique from Cassandra Kubinski, an artist I consider an expert in the technique. Notice that you can still understand her even when she "unsupports".
Here's another video, this time a co-write with me. singing "Still Breathing".
This is a great way to deliver lyrics with authentic emotion, and not just "sing". I consider it an important skill to master for many contemporary styles of singing.
What about you... do you do this? Do you do it deliberately?