所謂突然一陣靈感 a flash of inspiration 就是說一個人頭腦裏突然冒出一個創新或革新的想法或閃念。
John's new travel book was a huge success after the flash of inspiration he got while sitting on the bus.
The idea for my song came to me in a flash of inspiration!
另一個短語 a flash in the pan 意思是曇花一現，指短時間的走紅或暴熱。
Susan had a number one hit with her song, but after that we never heard from her again. People said she was just a flash in the pan.