Barn Owl

Years ago, my girlfriend (now my wife) and I were walking on
a raised boardwalk in a swampy area around 6:30 am on a summer morning.
All of a sudden there was this blood-curdling hiss/scream.
We never saw what it was, and eventually my right arm recovered
from the vise-like grip of my wife.
Initially we thought it might be a bobcat, but after thinking about it
we listened to the Barn Owl call and felt positive it was what we heard.