When has your imagination been the most vivid?

The time period when my imagination has been most vivid is now. I've seen enough movies and read enough books, and even just know a lot about the world itself. With all this knowledge at my disposal, I can alter it however I want in my mind. In fact, just earlier today I thought about a cheese astronaut rescuing a baby panda from a giant slug on Mercury in the winter. It was cool. After the astronaut flew off with the panda in his arms, the slug was looking up at them yelling "you jerk! you stole my food! I'll get you for this!"
Well, later on when the slug tried to come to Earth to get revenge on the astronaut he didn't last long. The military was using those airplanes that drop water on forest fires against it. The only thing was that instead of being full of water, they were full of salt. Oh yeah!
And today's experience was nothing compared to the other ones I've had in the past couple of weeks. I tend to imagine stuff a lot when I'm in my Spanish III class.