Due to the category this thread is in, I thought maybe it was a survey about favorite TV or Movie aliens. Oh, well...

Once I was doing some early evening observing out front with a telescope and a neighbor wandered by and asked me what that bright object in the sky was (it was Venus). She seemed disappointed with my answer, and told me her son (who I noticed was hanging out in front of their house, no doubt watching for a reaction) had told her the object was Capricorn 376 (or some similar made up name).

I explained that her son was playing a prank on her. She really had no way to know, other than to take my word for it.