Writers, how do you feel when an idea suddenly crosses your mind?

The first feeling I get is like I have been transferred to another world. Then I slowly calm down and my head intensely focuses on the idea and tries to expand it. If it is an idea for one of the stories I am writing, I try to make a connection so that it fits into the whole story. And if it is an idea for a new story, the “transferred to another world” feeling is even stronger. Then I feel as if I have discovered a new land, a land that is waiting for me to explore.
How about you?