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The following is a real life scenario.

Prof. Daniel Chan was teaching Calculus 3 with his British accent in Dennisson 260

Prof Chan : A Kookabura flies with a semicircular projection. Find the vector of the kookabura if this point is (0, 1, 1).
Anonymous student : Hmm...
Prof Chan : Here is how you do it. First...
(He was showing the class the method of solving a particular 3D vector problem until...)
Prof Chan : Therefore, the answer is <0 , 1, 1> + t<0, 0, 0>. Any questions? Yeah, at the back...
Anonymous student : What's a kookabura?
Me : Hahahahahahaha...!!!
Prof Chan : You're supposed to ask me about the vector but well, a kookabura is...

More recent real life conversation

South Quad, Dining Hall 1.

Khateeb : Okay, tomorrow you are going to wake up at 7.
Unmesh : Seven? Are you crazy? Why?
Khateeb : Because you are going to help me to find a place to live for the fall semester. We are going to knock on every door in Ann Arbor.
Me : What? You don't have to do that. You just have to check the paper for any vacancy. There are advertisements in there.
Joey : Knock, knock, is there a brain in there? No, it's empty.
Khateeb : Grrrrr....
Me : Joey, you better run.
(Joey looked scared.)