The short answer is, of course, not long. But your build, age and general level of cardiovascular health could make a small difference in how long you'd get to relish the unique experience.

A new calculator will estimate you how long you'd last. It is unclear exactly how the tool calculates survival times, or whether it's in any way accurate. I tested the survey with a few variations. A person with uber-thin Nicole Richie's build might make it 54 seconds. But a moderately healthy person weighing...