Cage diving with great white sharks: 1 in 250,000 chance it kills you

~4 micromorts. Like smoking 5 cigarettes, or driving 1,500 km. Estimate.

Mortmeter: Worth it. You pay zoo ticket risk for apex predator thrills; the cage does its job.

Assuming: One 45-minute commercial cage dive using surface-supplied air near the water surface

How we got this: Commercial cage diving has an extraordinary safety record with virtually zero confirmed shark breach fatalities. The peril is largely baseline shallow-water diving risk, cold exposure, and equipment panic. Calculating 1 cage session at 4 micromorts gives exactly 4 micromorts.

What gets you: Cold shock or panic-induced cardiac event, Hookah breathing apparatus failure or drowning, Freak cage breach or entanglement.

Cheaper version: Watching from the upper boat deck cuts the risk by roughly 80 percent.

Sources and method: how Mortmeter prices things, and the Atlas of measured risks.

More priced risks: Sharing a bottle of Flor de Pingus, Riding Polyppen at Bakken in Denmark, Eating 2 whole pizzas, Drinking a bottle of red wine, Winter bathing in the Øresund, A week of off-piste skiing, Getting LASIK eye surgery, Texting while driving on the motorway.