high compared to what? >:D
I assume you are referring to my second image? Well, its just that, a fast moving object colliding with a planet. As for how fast, I don't know, I didn't pay attention to how fast the object was moving. Lets say it was an asteroid or meteor, the average speed is between 25,000 and 28,000 miles (or higher depending), so the "high velocity" impact can be compared to the average speed of a meteor or asteroid.
I just think the shots look cool. :P