Intoxication Ensues: Ed Jerse's tattoo of a seductive girl named Betty talks to him and forces him to do horrible things. It's revealed that the red tattoo ink was made from rye and contained ergot alkaloid that causes aural and visual hallucinations. Scully got a tattoo as well, but was not affected to that extent.
It's All About Me: Mulder acts like a patronising Jerk Ass and can't see what's bothering Scully. At the end of the episode she has to remind Mulder "Not everything is about you."
Mulder: Eenie Meeny, Chili Beanie, the spirits are about to speak.
Soundtrack Dissonance: A favorite technique when coupled with the Gory Discretion Shot: something horrible would start to happen, and the camera would pan away, with cheerful incidental music being underscored by the sound of whatever godawful thing was happening. Used memorably in "Never Again".