Justin Bieber vs. A Glass Door: Who Will Win? (VIDEO)

Justin Bieber may have conquered the hearts of Tweener Nation with amazing ease. Other things—like, say, glass doors—still pose a challenge for him.

The 16-year-old My World singer recently took a bump on his noggin while trying to navigate a revolving door. As you can see in the video below, he still has a few things to learn. Such as that glass, while transparent, is also solid.

Don’t worry, Biebs; we’re sure you’ll get the whole opening-doors thing down at some point. In the meantime, we’re just gonna watch this video a few hundred times and laugh uncontrollably: