<human>: As the title says, my brother is getting married tomorrow around 6 pm EST and I am the one and only person giving a speech at the wedding so I want to make sure it's memorable.  Of course I can always talk about past experiences and him and his fiancee being together, all the typical stuff.  But I want this speech to be something that my brother and fiancee will remember for the rest of their lives and set the mark for the rest of my brothers (I'm one of 4) for when the time comes for the rest of us to get married.  What is the best speech idea you have or the most memorable best man speech you've heard?

Condense the text into a few key points
<bot>: My brother is getting married in a little more than 16 hours and I don't have a speech, in need of some funny ideas.