I think people are kind of pulling this out of context. If this were an immediate situation, that demanded immediate thinking, then this arguement would be going a different way. Prep time is where one person sits down, and comes up with a way to defeat obstacles before they happen. Iron Man's armor would be an example of this. It's meant to fight fires, withstand EMP, has several offensive and defensive uses, can tap into lines, and can even pull up information, as well as have some fighting routines put into it for specific fighters. He's pulling several things that may happen into account. That would be preparation, in comparison to seeing a kid in a fire and reacting, which wouldn't be considered prep time.