User blog comment:AndrewBrauer/Everything Wrong With Brawl in the Family in 6 Minutes Or Less (CinemaSins parody)/@comment-31789809-20170607123234/@comment-24200891-20170607131927

He knew that it was the volcano level because Lisa showed him the chart earlier in the episode and after everyone fought, every fool would realise it has that level. Clyde didn't know about the protocol but he was smart enough to interpret volcano as a critical situation.