'Draconian'

"Are you doing a face exercise? Your face keeps changing every second."

Hearing Alex's voice, Paula opened her eyes and looked at Alex.

"Did you just say something?"

Since she was deep in her own thoughts, she didn't really hear what he said.

With a smile on his face, Alex repeated, "I was asking if you are doing some sort of face exercise."

"Face exercise?" Paula said, feeling confused at Alex's words.

Seeing that, Alex chuckled and said, "You were thinking too deeply earlier and your face keeps on changing every second. That's why I asked if you're doing a face exercise."

Immediately, Paula came to a realization and her face suddenly reddened a bit.

Paula felt embarrassed for some reason.

From the way Alex is reacting, Paula can guess that she probably looked funny earlier when she was thinking. 

'Arrgggg! What was I thinking! I'm too embarrassed now!' She thought.

It took a few seconds before Paula recovered.