Saucer with white gassy bottom approaches beachgoers at night and zips in, and zips away...silently.

Me and my friend were sitting on the beach outside a Reggae club we liked to go to, it was late at night.  I'm pretty sure it was around Delray Beach.  Either that or somewhere from Ft. Lauderdale to Delray Beach, which was where we hung out.
We hadn't been drinking heavily.  We were looking out over the ocean and saw this strange light pretty far off in the sky.  We remarked on how unusual it looked and then we saw it zip around very fast at sharp angles, and come closer to us.   I know this will sound strange but it was as if it had tuned in to our thoughts.  I say this because it zipped pretty close to us and we got a real good look at it from underneath.
It was shaped kind of like a cake, or maybe a Fedora style hat and where the head-hole would be there was a pearly light but kind of gassy and ethereal is the best way I can describe it.  I say gassy because it was like looking into dry ice at a concert.  We looked at it for a minute up close like that and were talking about how cool it was but not wanting to get excited and scare it away, and another guy, rather drunk, came up behind us and shouted hey what are you looking at, and it zipped away and out of sight.  THERE WAS NO SOUND.
It happened so long ago, it's strange to try to recount.  It is hard to believe it was real.  But it was, I know what I saw.  Me and my friend lost touch a long time ago, but I did see a special on TV once about some UFO's seen in Florida by many people including law enforcement, like Sarasota or Jupiter Beach or something, and the pictures they showed that the people had taken, some of the pictures were of exactly what we saw.  That's my story.
Witness indicates that the date of the sighting is approximate.  PD