The last ufo drags across one of those crop symbols that were found in Uk (I think) a while ago and believed to be done by aliens. Done in corn crops and crap like that.....big symbols of weird origin.
Actually if you notice, every object that Pupus ship steals is somehow connected with aliens: The Easter island head is of unknown origin and some believe to be the work of aliens. The pyramids some people (me included) think there was alien help. The crop circle (obvious...what i said above) and the cow. The cow might seem odd but not really, how many old alien sci fi films have had ufos land on farms....heaps.
well theres my 2 cents worth.......