The context of the following conversation is Seeing a deer up ahead, Casey slammed on the brakes in her car.:
Casey says There was a deer crossing the street at the Parkway as I came home..
The friend responds Yeah, deer cross at night a lot..
Casey responds I knew they did, but I had never seen one up close..
The friend responds It's good you were paying attention then..
Casey responds I just saw something rustling and it caught my eye..
The friend responds It's a good thing you saw that..