I did not click the "child" option on the configurator. Looks like Porsche threw in a spare for you!☺
Great find! I hadn't seen this. MythBusters episode 124 deemed it "Plausible but not recommended" since high speeds were necessary to create an air bubble over the car. This doesn't seem like a problem to me. But here is an article explaining the physics behind this. A boundary layer forms over the cockpit at a certain speed which is dependent on the slope of the windshield among other things. Why Does Driving Faster With The Roof Down Keep You Dry? Good stuff.Didn't the Mythbusters test this?