In order to rescue Ray Stantz from Simon Quegg's Horse and Buggy, the Ghostbusters needed to create their own storm to help draw out the entities. Egon Spengler emerged with the Silver Iodide Device, something of a cobbled together extinguisher. The plan was for Egon take pilot Ecto-2 up into the sky where Slimer would fire the Silver Iodide. The pressure from the device proved too strong and Slimer lost control of it. The device fell into a river below with Egon, Ecto-2, Slimer, and Peter Venkman. Luckily, the device did its intended job and a rainstorm was created.
- On page two of Ghostbusters Issue #11, the Silver Iodide device makes a non-canon cameo on one of the blankets.