I don’t see how this is such a surprise...
Most all snakes (excepting constrictors) use their mouth to capture food...
Constrictors use their mouths.
They seize the prey, maintain a grip on it and then rapidly throw coils around it, causing the circulatory system/heart to “explode”.
[it’s not purely “suffocation”, as some think]
“I don’t see how this is such a surprise...”
Me neither.
Evolutionary biologists make things up and forget to actually do experiments.
Constrictors use their mouths to capture their dinners too. They just put the squeeze on after they’ve caught it.