Task: Question Answering
Input (English): Context: Stella called him a grumpy old man before laughing freely ; Mac 's heart skipped a beat as the breeze whipped her hair about her face . She led him to the weather - worn garden furniture and pushed him into a chair , thrusting a thermos of steaming coffee into his hands . Moments later , the sky erupted into brilliant colours : red , blue and white to celebrate their country . 
Question: Why did Mac 's heart skip a beat ?
Output (English): They were in awe of Stella 's beauty .