I have a presentation to do for my public speaking class on Sunday. I have to talk about a picture of my choice. I choose to talk about stairs and how stairs are significant to me because stairs are like life, in order to reach the top you need to take 1 step at a time. Well anyways i was thinking of opening the speech with a joke. Do you have any ideas of a nice opening joke that will get the audiences attention and get me a good mark?
I will appreciate any suggestions

Thanks!