Yogi: I was sitting and when I was hearing sound, it was frightening until I realized that it was someone pulling the curtain.

That got me thinking of awareness and concept – that without concept, we could be lost in awareness.

Sayadaw: You made a wrong conclusion from the experience – the experience you had when you were afraid was not pure awareness.

Your mind had already thought of some concept although it might not be a concept that you have a clear idea of.

That was not raw or pure awareness that was making you afraid – it was some wrong concept that the mind had.