I'll never forget sitting in that freezing classroom during my first NEET mock test, staring at a mechanics problem about a block on an inclined plane. My mind went completely blank. I knew I'd studied this—friction, normal force, the whole deal—but when the clock was ticking and my hands were shaking, I couldn't remember whether to use sin or cos for the angle. I ended up guessing wildly, wasted 8 precious minutes.