Your Rhino syndrome has an actual name. It’s called the doorway effect. It has been studied and is a very real phenomenon. It happens to pretty much every one of us.
For more info: https://www.google.com/search?q=doorway+effect&ie=UTF-8&oe=UTF-8&hl=en-us&client=safari
Thanks for the link.
Every member of our family has the doorway effect.