One problem I can see Gerber having with Man-Thing is what to do on the regular issues, the ones where he has a somewhat ambitious narrative structure, but isn't doing anything fantastical. Gerber excels at the fantastical. This issue is not fantastical.
The structure's kind of neat. Man-Thing saves a guy who runs into a girl in trouble while Schist is plotting against Man-Thing (though Gerber tries too hard on the humor of the big scheming scene) and then Man-Thing runs into the trouble the girl's running from (a biker gang). It all comes together at the end.
Maybe if the guy, the protagonist for a lot of the issue, were a better character, it would work. Instead, he's a comical doofus; Gerber goes for jokes for his backstory without thinking them through.
It's a dense issue, however, and Gerber's plotting is a success. Mayerik and Trapani keep it moving.
Nowhere to Go But Down!; writer, Steve Gerber; penciller, Val Mayerik; inker, Sal Trapani; colorist, Petra Goldberg; letterer, Jean Izzo; editor, Roy Thomas; publisher, Marvel Comics.