Not the drop act, but the process of try a new story but on the first chapter predict the train wreak coming before it's happening.
Uh...let me clear this first, you mean the moment I pick up a story, read the first chapter, then for some reason, I already knew what will happen next and don't like it?
Well, I guess the feeling would be the same. Nothing, just the usual. Close the tab, then move on. Though, as I've said before, even though I knew what will happen next, I'd still give it a try for as long as possible. I'd only get turned off once the plot, and events, are repetitive, and the characters don't grow at all.
While some may disagree, I believe the charm of a story (as well as the skills of an author) doesn't have to be judged in the very first chapter.
I'd be extremly surpised if anyone could predict where my story was heading from chapter one. I'd be surprised if they knew after chapter 20.
Reminds me of the time someone in the SH main site commented that "Almost all of the characters have already been introduced" in my story. That was the 4th Chapter of the 3rd Volume.
Fourteen volumes in, and I'm still yet to introduced more.