It's a challenge. I feel like I've been asked, "Give us something vaguely religious that doesn't call for any kind of response on our parts. Oh, and if you can't be entertaining, at least be brief." But then, even in church these days, where Jesus Christ is acclaimed Lord of all, I think that's what a lot of people want -- and in too many churches, that's what they're getting.
So, it's kind of like Paul preaching on the Areopagus. You're not on your home turf, and you have to be careful to keep people with you. But you must say something worth saying: this may be the first (or even the only!) time someone present may hear the Gospel presented.
Well, I've been doing this a long time, and I know how to sail as close to the wind as my boat will allow while avoiding the rocks and reefs. And even as I do, I'll be letting down my nets and trusting God for a catch.