Logic or heart.

"Wait a minute! How the hell did you know that I am scared of heights?" Brian asked.

"You became way quiet than usual, You were acting uncomfortable when someone spoke about the Blazing wheel, your voice was tense when you asked a question about it."

"You are someone who likes doing things together with others, but without a reason, you decided you didn't want to join them."

"Your palms were clenched nonstop at the Blazing wheel and your…" Luciano was still going, but Brian decided to stop him in his tracks.

"Was it that obvious?" Brian asked in an anxious tone as they turned into the road that led to the carousel.

"They were focused on the ride so I doubt, it was obvious to me." Luciano answered without a change in expression.

"Thank the heavens." Brian let out a sigh of relief.