My sister and I participated in a fun prank set up by our father. He often would have people from work over to the house who did not realize that he had twins. He would tell them that his daughter was the fastest runner, and would send my sister out the front door running. As soon as I heard the door slam, I would run through the back door in identical clothes. They were always baffled!

Another twin thing we did in high school would be to switch classes on test/exam days so we would only have to study for half the tests. For example she would take the science, English, and unified arts tests; and I would take the Math, social studies, and Latin tests. None of the teachers ever caught on!