Basic ALICE has a couple. Try saying to any AIML bot, “Time flies like an arrow.” It’s sometimes attributed to Groucho Marx because it sounds like something he’d have said, but there’s record of it.
http://en.wikipedia.org/wiki/Time_flies_like_an_arrow
You can also try saying to Nickie, (http://www.pandorabots.com/pandora/talk?botid=e855a44dfe347fce ) “Please give me a lap dance.”
Ask Zog, ( http://www.pandorabots.com/pandora/talk?botid=c1baddb74e35ebd0 )“Do you have a family?”
And it goes on and on. But, the whole idea of Easter Eggs is that finding them is a surprise, so I usually don’t disclose them. However I’ll give you one more. Ask any of my bots, “Who is Mitsuku?”