Possessed Subway Trains were normal subway trains possessed by poltergeist energy.
When the Doomsday Door was prematurely opened, the released poltergeist energy first possessed nearby subway trains and altered its appearance into a sinister monstrosity. When the Ghostbusters arrived at the subway station, it was nearly destroyed during a battle with skeleton spirits. It collapsed onto itself then vanished.
Possessed Subway Trains were normal subway trains possessed by poltergeist energy.
When the Doomsday Door was prematurely opened, the released poltergeist energy first possessed nearby subway trains and altered its appearance into a sinister monstrosity. When the Ghostbusters arrived at the subway station, it was nearly destroyed during a battle with skeleton spirits. It collapsed onto itself then vanished. They were last seen when the Ghostbusters used their Proton Packs to pull back everything that was set loose. The poltergeist energy surrounding the trains was pulled back, as well, and the trains returned to normal. Possessed Subway Trains were normal subway trains possessed by poltergeist energy.