What's the best way to tell a story? The best way is not to think of yourself as this elaborate crafter of stories, but instead, just relive it. Don't worry about memorizing it and getting everything just right. Just relive the experience. As you see it. Use your mind's eye you've saw that person you're talking to and what they said why they were surprised.
Just re tell it relive it. Don't worry about memorizing the dialogue that's the right way or getting the setting the right way or the pacing. Just share the experience. As it happened, relive it, it'll be easier for you, you'll be feeling the experience. It's going to be easier for your audience, to feel the experience as well.