The East Side Phantasm is a two headed ghost that haunted the abandoned EJEA Warehouse.
After Ray Stantz claimed to see a precognitive vision of a bust, the Ghostbusters were called to the exact EJEA Warehouse. During the bust, Peter Venkman missed the ghost and blasted through the roof and hit the warehouse's water tower. The tower tipped over and swept the guys up.
The East Side Phantasm is a Free Repeating Phantasm.