Tywin Lannister meets his end in the most unexpected way, shot by his own son Tyrion while sitting on the toilet. This shocking moment in 'A Game of Thrones' perfectly captures the series' brutal irony. Tyrion, who's just escaped execution thanks to Jaime, finds his father with Shae in bed. The betrayal fuels his rage. He grabs a crossbow and confronts Tywin, who dismisses him even then. The bolt hits Tywin in the gut—a fitting end for the man who always considered others beneath him. What makes it legendary is Tywin's final words: 'You... you are no son of mine.' Tyrion replies, 'I am your son. I have always been your son,' before firing the fatal shot. The scene's raw emotion and poetic justice make it unforgettable.