More than a few skydivers have experienced a main canopy malfunction. There’s a minimum altitude required to safely cut away one’s main and deploy the reserve chute. The higher you are, the better: you have some time to assess your situation. But the longer you wait to make a decision, the closer you are to the ground and your options start to dwindle.
The principles are similar when you’re in the middle of a 20-square-mile lake with a belly full of biscuits and gravy and you feel that first rumble that says, “Nature calling.”