Seeing a famous person in the wild can be exciting and overwhelming for some people.
Well, that's the excuse this guy is presumably using to explain his royal celebrity stuff-up.
Twitter user @HonoredSpirit took to social media on Monday to tell the story of his friend, who ran into one of his favourite actors, Matthew Broderick in a convenience store in Montauk.
The man spotted the Ferris Bueller's Day Off actor, who was in the shop grabbing groceries with a friend, and asked whether he could take a picture of the star with his daughter.
Here is the tale, in his own words.