I had a tough work out today, where I felt quite bad afterwards until I ate something, suggesting that I had let my blood sugar get to low. But the really strange thing to me, was after my deadlifts, I was standing and recovering, and all of the sudden all of the noise in my gym dulled considerably. I could barely hear the radio playing, and the noise of the machines went from a constant noise to a dull whisper.
Has anyone else experienced this? It went back to normal after a few minutes, as suddenly as it started.