Why do tough interview questions still rattle me?

You can handle the easy parts now. It's the follow-up question, the pause before you answer, the panel of faces watching you — that's where you go stiff and start reciting instead of thinking. Here is the honest part: the question was never the problem. You have decided, without noticing, that interviews are attacks you must survive rather than conversations you're allowed to have. That decision is what tightens your chest, not the words coming out of their mouth. Bracing for a test costs you more than any hard question ever could — it costs you your own mind, right when you need it. You cannot control which questions they ask or how many faces are in the room. You can control the posture you walk in with. That's the whole task here — not memorizing better answers, but choosing, deliberately, to show up as someone thinking, not someone defending.