These were Hun Identified Flying Objects.
It has great food, but a bad atmosphere.
It's some time in the second world war and Hitlers top scientists have built a time machine. Eager to use it, but fearing an accident, the fuhrer instead sends one of his henchman forward to 1985, hoping to gain knowledge of the future to use against his enemies.
Much to Hitlers chagrin however, the henchman quickly returns to the present with only a Casio Keyboard in hand. Breathless with excitement, he declares "Mein Fuhrer! With this device we shall wage sonic warfare on our enemies!"... He hits the demo button and the room is filled with sound.
"So... what do you think?" says the henchman.
Hitler, aghast at this otherworldly device says
"You must be mad Schultz! There's no place in this world for a Nazi Synthesizer!"
