I have the issues with Spider-Carnage, and Ben Reilly was Spider-Man at the time. It was a four-part story I think called "Web of Carnage", and Carnage didn't even appear in the first part but it was mentioned that there were sightings of Carnage on the loose even though John Jameson confirmed at Ravencroft that Kassady was still in his cell. In part 2, Reilly caught up with Carnage but it was revealed that the symbiote had left Kassady and bonded to Jameson. In finding Spider-Man, it took a new host again and thus Spider-Carnage was born. The third mostly focused on plots of the Cone Saga but culminated in Spider-Carnage almost killing Peter on a rooftop, but Ben regained control and ran off. And in the conclusion, Reilly went back to Ravencroft to ask Kassady how to control the symbiot, but, upon seeing Kassady, the symbiote realised he was dying without it and tried to rebond with him. So, Reilly had John Jameson lock him in a high-frequency-room-kinda-thing so that Carnage could never be reborn, but the symbiote went up the tap at the sink and through the piping back to Kassady's cell - which was how it escaped in the first place and why any time you saw Kassady during the story he was washing his hands. It was actually a fairly decent story.