People Are Only Just Realising Why You Forget Why You Walked Into A Room
That maddening blank moment in the doorway has an actual scientific name.
You march purposefully into the kitchen, then freeze. Why did you come in here? Everyone has done it, and it turns out your brain is doing something surprisingly deliberate.
Researchers call it the doorway effect. Passing through a doorway seems to act as a mental boundary that tells your brain one episode has ended and a new one is beginning.
When that boundary triggers, your brain files away the plan you were holding to make room for whatever comes next. The intention gets shelved a little too efficiently.
That is why walking back into the original room often makes the thought pop right back. You are not losing your mind. Your brain is just a bit too keen on tidying up as you move around.