Midnight Star
Contributor
There have been two near deaths, from asphyxiation (resusitation was required - it brought them back) recently in both a home owned, and zoo managed constrictor (they were fairly large).I've had a bit of experience with very large snakes and I find it hard to belive that one has ever killed an adult human. It is not difficult to unwarp the snake as it tries to wrap around you, though bites do hurt.
What your seeing is the snake not fully in constricting mode, and fairly relaxed when you see them move and bend it about - once it gets around you and starts to squeeze, there's really not much a person can do; they're stronger than what they look. I've even seen smaller constrictors wrap around a persons arm and they have difficulty removing them ... the snakes "feels" the pull, and tightens even further. Without leverage, it's lights out ... just hope someone is near by to help.

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Mike.