怦然心动

Explanation: Refers to something due to the attraction, thoughts, and feelings from the fluctuations. 　　Usage: Partial official; as predicate; refers to something due to the attraction, thoughts, and feelings from the fluctuations 　　Source: Warring States Chu Song "Nine debate": "Come what very secretly pity, heart beating Come straight understanding." 　　Examples: I saw her ~. Thesaurus:  Nervous