Manta Rays can leap into the air and give a flat resounding crash as a ton of flesh hits the water. They have no teeth or grinders, no tail stinger, but relies on speed to survive.They are plankton eaters. (From the silent world by Jacques Cousteau)
I have only seen a Manta "Fly" once,on a liveaboard in South Male (Maldives). According to an 'expert'from the Florida fish and wildlife Commission stingrays also take to the skies to escape predators.
So it doesn't only rain cats and dogs !