It's important to show how all hell broke loose, but is it bad to still tell that it did? It seems like you should be able to say something like "As soon as he stepped on the boat, all hell broke loose." Followed by a description of what happened.
Why tell if you are already going to show. And why do you summarize first before you let us experience it? To me, that's short circuiting the experience and letting the cat out of the bag too soon. Really, think about it. Would you write like this?
"Hannibal Lecter killed and ate his victim" followed by the details of how he did it? Sure, you can do that, but part of the experience is to be grossed out and shocked and horrified. What is the purpose of letting us know he killed and ate the victim before describing it in details? What are you trying to accomplish?
I've
learned from my editor (and I totally agreed with her) that if you must summarize the whole thing, do it last for emphasis:
Compared this:
"The steak melted in my mouth. The buttered lobster tail exploded with flavors, followed by a hazelnut creme brulee that lingered. The meal was scrumptious."
with this:
"The meal was scrumptious. The steak melted in my mouth. The buttered lobster tail exploded with flavors, followed by a hazelnut creme brulee that lingered."
In the first example, the last line emphasizes what we just experienced, and the readers would -- hopefully -- agree: yes, indeed, it's scrumptious because they've already tasted, in their minds, the steak, the lobster and the creme brulee. The agreement is spontaneous and relevant.
In the second example, the first line is wasted. We haven't tasted anything yet. We're set up to believe the meal must be scrumptious. And it was, but it's after the fact. The first line does NOTHING. It has no effect. The rest of the paragraph does the job nicely of conveying the fact that the meal was scrumptious -- thank you very much. Setting up expectations only set up disappointment: what if the rest of the paragraph doesn't sound scrumptious (let's say, the reader don't like any of that food)?
Better yet, cut out the summary and let the facts stand. Then the readers can make up their own minds: "ooh, that sounds scrumptious" or "ewww, I hate lobsters and creme brulee."
Then you have someone who says: What about just telling them "the meal was scrumptious." You can do that, definitely, if the summary is enough. The issue here is, again: Do you want your readers to experience it, or do you want them to take your words for granted? That if you say the meal was scrumptious it must have been scrumptious.
Maybe I should give readers more credit, but I get the impression that if you give them a hint about how they're supposed to feel about the events that are about to transpire, they are more likely to have the appropriate reaction.
Yes, you should give your readers more credit. Also, you shouldn't try to "force" your readers to feel either way. And you should give yourself more credit, too. It seems to me that you're not confident you can get the point across and make the readers come to the same conclusion, so you feel you have to preemptively tell them, before anything happens, what happened and how they should feel. You're forcing your conclusion on them before presenting them with evidence. That's the ultimate pitfall of "tell" and if you do that BEFORE you show, you beat the purpose of "show."
It's as if a lawyer tells the jury, "thus, the defendant is guilty without a doubt" before any evidence is presented or witnesses questioned.
So what if the boat capsized and the grill fell in the water. Maybe the reader doesn't like bbq. (okay, extreme example, but you get my point.) By saying all hell broke loose, you are telling the reader to be prepared for everything that is about to happen.
SHOWing us how Hell break loose is ALWAYS more interesting than telling us. Why must you prepare your readers? Think about it, when you watch a movie, would you want the narrator tells you how Romeo and Juliet died at the end first, before showing us how things happened and how they, yes, died at the end? Again, why do you feel like you have to summarize for them first?
Do you not trust the readers to be smart enough? Or do you not trust you're a good enough writer to get the job done?
If you must tell, then tell. But it really is pointless to tell, then show...
Worse, in your example (what if the readers don't like BBQ), do you really think now they would decide "yeah, all Hell did break loose" because you told them first? I'd counter and say now they will call you bluff, because you set up expectations. Now they're going to say, "bullshit, all Hell didn't break loose. It was just a tiny accident."
So, in this case, it's better to let the readers be the judge and leave the judgment out. Present them with the facts only. Don't editorialize.