Jack Laurence

And then comes the question nobody warns you about.

How do you come back?

Deadly undercover operations, terror attacks, life-altering catastrophes thousands of feet in the air and kidnappings.

Prison escapes have been taking place for as long as prisons have been around.

In fact, one of the earliest prison escapes on record was back in the 13th century, when a Welshman was imprisoned in the famed Tower of London.

He would craft a makeshift rope from bedsheets and cloths.

Lowered from a window, he'd climb down.

One of the world's most famous prison escapes was that of brothers John and Clarence Anglin and Frank Morris.

Three men who had escaped from the world's most secure prison in 1962.

The famous Alcatraz.

The escape had many elements that would capture the world's interest.

The sheer planning alone was quite ingenious.

The three men would make dummy heads of themselves, made from plaster and real hair.

They'd place them in their bunk so as to fool the guards who would make regular rounds during the evening.

They'd escape through vents in the cells, scaling up pipes and out of a ventilator grill on the top of the prison.

Then they'd make their way down the building, climbing the prison fence and to the water's edge.

The water being the frigidly cold San Francisco Bay.

It was then a 1.25 mile or 2km swim to shore.

They'd stolen 50 raincoats in which to construct a raft in order to assist them with the swim.

But it's what happened next that is likely the reason this escape has become so famous around the world.