FANTASTIC FOUR (1961) #231

The FF and an entire city block are trapped in the Negative Zone! The team must battle Stygorr before he can destroy them as he has vowed. Meanwhile, the civilians caught in the Negative Zone grow restless, and begin to storm the Baxter Building! Notes Features the Hostess Twinkies Cakes ad, Iron Man In « The Charge Of The Rhinos! » Bob Budiansky’s assistant editor credit taken from letters page header.