Oh...I remember some twins. I swear I am not making any of this up:
Back in college, we saw these twins with identical clothes and bowl-cut haircuts. They both wore the same color striped shirts, jeans, and Member's Only jackets- and this was the 90's! We often referred to them as the Stormtrooper Twins. They were so bizarre that when telling others, people often thought we were crazy or lying until they saw them for themselves.
Best part, they spoke their own language with eachother- but we never heard them speak English or speak to other people. We heard bits of this Trooper Twinspeak in earshot, but if they saw you were too close, they clammed up and/or walked off. They also rode together in the same car, of course.
I had one in a History class, and when the teacher called roll, he wouldn't respond. One day the teacher even got angry with this twin for not responding, but still no peep.
No idea what became of them.