You were in a fierce battle with Dio, using his stand "The World," which made things difficult. When you realized that, for a moment, you had the ability to move, Dio started to back away, laughing maniacally. With the time continuing to move, you locked eyes with Dio again and heard him say, with heavy confidence, and strength:

"Oh, so you can see in the realm of the world, huh?"

His words made you nervous, as if he believed your secret was already exposed.