Serious question: if you're asked to speak at someone's funeral, you pretty much have no choice but to say yes, right?
Ok, quick tangent. About 2 weeks ago, a young women (35-ish) at work passed away after dealing with some chronic illness for a little while. But it was still kind of sudden. I knew her tangenally, been in a meeting or two with her, and said hi in the hallway, but didn't know her too well.
She had worked for my government agency for a long time, and used to work for a congressman before that. Our office had a huge funeral for her; many of her family members flew in; her old congressman came and spoke for her, the Assistant Secretary spoke, her close family and freinds, and, although the Secretary couldn't be there, she wrote up a very nice few words that were read at the service.
I showed up just barely on time, and when I did, a woman from the congressional affairs office grabbed me and said "there's a seat for you up here," and led me to the front row, next to the other speakers. One by one, each one was getting up to talk about his or her rememberance of this lovely woman. I'm four or five deep, but I can see it coming to me, and I'm kinda like, WTF? Then this woman comes and says "Ok, do you want to say something?" And I'm like, holy crap, this woman thinks I'm somebody else. Somebody who is close enough to the deceased to say a few words. For a BRIEF second, I thought about going up and winging it (that's kind-of how I've survived professionally these past 15 years), talking about her smile or her spirit, or whatever, and how she brought everyone around her happiness. But my quick calculation of "things that could go wrong" really rang off the charts. Instead, I lowered my eyes and said, "no, I'm sorry, I don't think I'm ready."
I tried to make a B-line out of there, but I was stopped by this sweet lady who tried to give me the deceased's pictures and some other effects that they had laid out for display. I was still feeling pretty bad about the episode, so I told her that I'd take care of it, and had to spend the next twenty minutes tracking down my doppleganger and giving him this stuff.
It was really a weird experience.