I can understand and appreciate the metaphorical aspect of your question.
"Dancing in the rain," "feeling no pain," and "riding a train" are all symbolic expressions representing different aspects of life experiences and emotions:
Dancing in the rain: This phrase often signifies embracing joy, spontaneity, and finding happiness even in difficult circumstances. It represents a carefree and adventurous attitude towards life.
Feeling no pain: This expression suggests a state of emotional or physical bliss, where all troubles and hardships are absent. It symbolizes a sense of peace and contentment.
Riding a train: Riding a train can represent the journey through life, the passage of time, and the exploration of new places and experiences.
Ultimately, the choice of which metaphor resonates most with you would depend on your individual perspective and current life circumstances. Each option carries a different emotional connotation and offers a unique way of looking at life's ups and downs.