Actually I made a five minute speech like that last week... It turned out really Walt Disney, but the beginning was good.
Started explaining how I didn't know what to talk about, so decided to go with one of my major intrests: heavy music, beer, and girls.
Well, first of all, don't know shit about girls.
Everytime I touch beer, in the morning i realize I don't know shit about that either.
Metal music... Let's see... The one thing I know at least a little about.
And then went of rambling about how you should pursue your dreams and other overly dramatic crap about how I would like to make millions by playing in a metalband or something.
Started out nice, but ended up like something out of a corny motivation speech.
Lesson of the story: Don't try speaking about how you don't know what your gonna speak about.