Even Applejack leans in over the table, clearly interested in your tale of otherworldly technology. Anything to keep her off the topic of you and Dash, “It stands for Positron Emission Tomography, it basically reads the little flashes of light that occur when anti particles called positrons annihilate with matter in your bloodstream. You can get a pretty good picture of active areas of the brain by seeing where most of the blood flow is, or where the majority of annihilations occur."