Moo??

I stopped by a convenience store/gas station on my way to work this morning for snacks & coffee... Usually the little quickie marts like that have the little single serve packages of International Delight flavored creamers - not this one. They had some contraption of a machine that dispensed plain creamer plus your choice of 4 flavors when you pressed down a lever. Ok - no prob. So I fill my cup with coffee, slide it under the spout, press the lever, yada yada... and when I let go of the lever, it MOO'ed at me. The first time I wasn't quite sure what I'd heard so I did it again... yep! The machine actually MOOS at you when you're finished. Umm... ok... I wonder if they had to pay extra for that feature?