Rey Rivera was just 32 years old when he vanished without a trace on May 16, 2006. A week later, he was found dead in Baltimore's Belvedere Hotel.

From the execution of Nazis during the Dachau reprisals to Marvin Heemeyer's customized "killdozer" that nearly destroyed a whole Colorado town, these stories take revenge to the next level.

On a barroom bet, Thomas Fitzpatrick landed a plane on a Manhattan street. And when another drinking companion later claimed that landing never happened, Fitzpatrick did it again.

The painting was an untitled piece by 20th-century French artist Yves Tanguy, whose artworks were compared to the likes of Pablo Picasso and Salvador Dalí.

In September 2006, Steve Irwin was filming in Australia's Great Barrier Reef when a stingray suddenly pierced his chest. Within minutes, he was dead.

Count Xavier Dupont de Ligonnès vanished after the murders of his wife and four children in 2011 — and no one has seen him since.

When Rocky Dennis died at age 16, he had already lived more than twice as long as doctors expected — and lived a fuller life than anyone thought possible.

Vivian Liberto was Johnny Cash's first wife and had four children with him. But after their divorce in 1967, she was cast as the bitter shrew who held his talents back.

Measuring nearly a foot wide, the Goliath bird-eating tarantula takes down prey like mice and birds, then liquefies their internal organs.

Zinaida Portnova was a typical teenager in Belarus, but when the Nazis invaded in 1941, she became a deadly resistance fighter who would later be awarded the Soviet Union's highest honor.

Guitarist Chris Pérez married Tejano singer Selena Quintanilla in 1992, but what happened to Selena's husband after her tragic murder in 1995?

In March 1981, Marianne Bachmeier opened fire in a crowded courtroom and killed Klaus Grabowski — the man on trial for murdering her 7-year-old daughter.