As far as the words he improvised, I would challenge you to find examples of other sentences in news or literature or culture that start with the exact phrase "In your life" (followed by "have you seen", not "did", your prior comment is incorrect). The guy basically created a new sentence structure in the language right on the spot, on the biggest stage.
And I'm far from the the only one who considers this a great call. Here are a few lists which place this specific call as the top-ranked golf announcing moment and among the top 10 sports calls, ever: https://syndication.bleacherreport.com/amp/1433660-the-most-... https://nypost.com/2020/01/08/ranking-the-greatest-sports-br... https://www.nbcsports.com/mlb/news/the-32-best-calls-in-spor... https://golf.com/news/ranking-the-greatest-broadcast-calls-o...
At 3:20:50 of [this video](https://www.youtube.com/watch?v=PreYFbNZpVU) is another all-time legendary shot at the Masters. But the announcers say nothing for nearly a full minute and finally concede "words do not do justice to the greatness of that shot." By contrast, Verne found the perfect words instantaneously and delivered them masterfully (no pun intended).