User blog comment:AndrewBrauer/Everything Wrong With Brawl in the Family in 6 Minutes Or Less (CinemaSins parody)/@comment-31789809-20170607123234/@comment-31563773-20170607134224

First off, you'd have to not be paying attention in school to know that lava coming out the top of a volcano is a clear sign that it's erupting. And since Lincoln isn't that stupid, he had a feeling what it probably meant. The fighting he saw might as well have been an erupting volcano. Second, Lincoln didn't care about Lori moping around when the kitchen is open to everyone in the house. Had he known about the protocol he would've understood and just went elsewhere. Also, I believe it stands to reason that Clyde didn't really know what Erupting Volcano actually meant, but he knew that it likely meant Lincoln's sisters were fighting again. He's his best friend after all, so he knows how crazy the girls can be.