>For an adult Python sebae approximately 6 m (20 ft) in length, body diameters are sufficient to produce constriction pressures in the range of ~6–10 psi per coil, with reported maxima in large constrictors reaching ~15–25 psi. Assuming a human-sized thorax with ~15 cm diameter (circumference ≈ 0.47 m) and a 4 cm coil band, the contact area per loop is ~29 in2. With three coils engaged, this yields ~87.6 in2 of contact. Multiplying by 6–15 psi gives a circumferential force of ~525–1,315 lbf, and at 20–25 psi (upper extremes) ~1,750–2,190 lbf. These distributed pressures are sufficient to cause rapid circulatory arrest, consistent with observed prey incapacitation within seconds.
GIWTWM