When I first came to the yeshiva, there was an alter bochur who missed shachris, insisted on second dates, and wouldn’t date daughters of gioreses, and once told me you don’t need to worry about slippery slopes, and told ridiculous things in the name of the kotzker.
So this alta bochur was a bit insulted that he was never asked to speak between mincha and maariv on yontiff, just because he didn’t have a rich father in law. So one year, he told the rav, that he was going to speak on the first day of yontiff after mincha, and that is it. So the rav said ok.
So the altah bochur got up, and he klerred a chakirah. What is pshat that we say shmone esrei twice on the first day of pesach. Is it because we forgot to skip mashiv haruach, or is it because the minhag is to say it twice. And the nafka minah is if you are holding by mashiv haruach and remember: should you say it or skip it.