open minded to opinions

[Gawdzilla Sama]

Sounds like a cheap parlor trick to me. Have you considered the possibility that you were being pranked by one or more of the witnesses?

If the saucer was wet underneath, it could literally be floating on a pocket of trapped air.  Or, vibrations in the earth from construction or earthquake.  But yes, pranking is also a possibility.  Or power of suggestion.

And "lying". Always an option.