For me, this is the injection of anesthesia at my latest consultation at the dentist, it was so painful that i screamed to him. Anesthesia is rarely a time of pleasure, but damn, it has never been so painful.
For me pain is multidimensional, there’s different kinds of “worst.” The short drop onto a hospital bed after surgery was by far the strongest, sharpest, brightest pain I ever felt, but it only lasted a millisecond. Kidney stones can be sharp and radiating, but the pain tends to be localized with ebbs and flows. Pancreatitis was not as “sharp” as a kidney stone, but it was bigger, harder to tolerate, more attention consuming, and came with aweful nausea.