Psychology
My girlfriend was sick, but she needed to be at a Psychology class. I took her place with a small tape recorder to tape the class while taking notes from the board.
My girlfriend told me that, unlike high school, there was no roll-call, so nobody would notice I was sitting in for her. I don't know why, but the professor started the class calling out every name from a list.
Bugger.
My girlfriend's last name started with a V, so I had all the time in the world to count heads. Thirty-three students, myself excluded.
Every student answered the roll call with a 'yes', or 'here', or 'present'. When my girlfriend's name was called, I rose from my seat and said, 'Statistics say that one in thirty people is a psychopath.'
The professor looked up at me, smiled and said, 'So?'
'Including you and me," I said. 'I count thirty-five people in this room.'
She nodded. 'Is your girlfriend unable to attend?'
'Yes,' I said. 'She has the flu.'
'So you altruistically volunteered to spend an hour with us.'
'Not totally altruistic,' I said, 'but, yes, I did.'
'A psychopath wouldn't volunteer,' the professor said, 'so I can rule you out now. Please sit down and take notes.'
I sat down and she looked around. 'Now we have an hour to figure out who is the psychopath among you.'
That hour turned out to be quite informative.
Source :https://www.quora.com/How-can-you-introduce-yourself-in-an-amazingly-unique-way