Up to this point, Marvel Comics were known for their mix of real-world problems, all-out action, and moments of levity. Through his various columns, including the Bullpen communiqués, Stan Lee created the most fun-sounding office on the planet, one where everyone had nicknames and yucked it up with each other.
With NOT BRANCH ECHH, humor took center stage, as you can see from the first cover drawn by Jack Kirby which features the Fantastical Four, Doctor Bloom, the Silver Burper, a Batverian minion and a cat terrified by the approaching Forbush Man.
The first of four vignettes inside continues the craziness in a chronicle called "The Silver Burper" by Lee and Kirby starring Thung, Weed Wichards, the Human Scorch, and Inevitable Girl.
A running gag throughout the strip revolves around Weed attempting to turn the Thung back into regular old Bim Grimm. He balks at the smell and refuses until Wichards says, "If you don't drink it, I'll explain the Negative Zone to you again!" With that, he gives it a swig and definitely does change... into the Hulk as well as a Skrull, the Mandarin, and others. In fact, these transformations elicit huge laughter and the Inevitable Girl line "Y'know why everyone loves our stories? They're so realistic!"
From there, we cut to Dr. Bloom of Batveria, "the ex-dentist who turned to supervillainy, for the sheer sport of it." He stole the Silver Burper's powers for a while until the heroes showed up and Bloom got scared off by Thung's face turning in his.
The second installment, called "The Fastest Gums in the West," came from Roy Thomas and Marie Severin. In it, the Too-Gone Kid chased down Rawhide Kid and Kid Colt for making off with real fake gold.
From there you get the original Human Scorch taking on the Sunk-Mariner thanks to Lee, Thomas, Ross Andru, and Bill Everett, who created the actual Namor. One of the best visual gags in the whole issue comes at the end of this series when we get a look at the Happy Haven Home for Hoary Halcyon Heroes which includes more than a few familiar faces from Marvel and beyond.