Tom Ketchum's Hat

Origin
Tom Ketchum was a cowboy turned criminal who occasionally operated with members of Butch Cassidy’s Wild Bunch. Known to sheriffs as “Black Jack", he specialized in train car robberies. One robbery resulted in the death of his brother Sam and Tom tried to recapture the same train again using the same method at the same time; the conductor recognized Ketchum and shot him off his horse. The town of Clayton sentenced him to hang, but nobody there had prior experience. The rope used was too long and Ketchum had gained significant weight, resulting in decapitation when he fell through the trapdoor.

Effects
The user will feel utterly compelled to redress any mistake or misdeed they have experienced and try to correct it. However, they will just repeat the circumstances of the event as much as they possibly can, trying to get it right the second time by using the exact same method. This normally results in capture or injury by the other affected party. The user will at some point afterwards have their head severed off by an impact of blunt force trauma to the neck.