As can be seen form the photos, the man luckily hit the softer rear part of the roof. (bestride.com)
Regarding rear part, it seems that rear screen will follow the bold aesthetic of the concept car. (mercedesblog.com)
This in itself is not really an issue, it's more the fact that the side and rear parts of the shoulders are often neglected by default. (fitnessandpower.com)