When Mulder and Scully are discussing the nurse's ingestion and subsequent vomiting of pins. Scully mentions pica which is a condition that makes people eat non-nutritious and non-edible things, such as rocks, glass, metal etc. Mulder then goes on to describe allotriophagy, which he suggests is a condition, possibly even a spell, that causes people to vomit things they never ingested in the first place. This is completely untrue. Allotriophagy is similar to pica in that it is defined as a depraved appetite or desire for improper food.