Why does every building in Gotham City have a sky light? And if the eccentric criminals don't break through it, then Batman will. Does this mean that when Batman goes to a crime, he's all like "Let's see. Where is that skylight? Oh... It looked like the criminals have already broken through it. I guess I'll just us the door... Wait, is that another sky light? Nope... Maybe there is still some glass in the sky light that isn't broken that I could jump through."