After completing IM Vx administration of Flu, Moderna, and HPV (1) Pt experienced textbook syncopal episode. Pt regained full level of consciousness within seconds. This nurse had Pt in laying position for 5 mins prior to coming to sitting position for additional 10 mins. At that time the Pt was escorted to front desk area to check out. Pt had continued monitoring for another 15 mins. Pt stated they felt safe to leave after checkout was complete. Education was given on S/S to watch for over the next few days.