Hey Pandas, What's The Craziest 'Karen' Encounter You've Ever Had?

Worked at a National Park centre. Shore, tides, gulls, snails and stuff. Karen stomped in and complained that she paid to swim in the sea (which is gone during low tide, you know...). After we explained, Karen complained about the "unreasonably complicated" tidal calendar, and demanded we reschedule high tide for her. Yeah, no.