2. And he's...OUT.
3. I guess he failed to notice that entire wall of glass.
4. The worst part? He had to buy another $6 latte.
5. Nobody is safe. Not even celebrities like Justin Bieber.
6. In his defense, there shouldn't be stairs leading that way.
7. Oh, were you hoping to leave that casino? TOO BAD.
8. Running indoors is never a good idea. Actually, running anywhere is never a good idea.
9. I feel like they probably should've used some high-quality glass in this situation.
10. He got a head start...literally.
11. Don't worry, I'm sure this happens to...no one else.
12. Walk it off, bro.
13. There's just so much happening here. So much.
14. I always knew my hatred for revolving doors was justified.
15. And don’t try to use doors where there wouldn’t normally be any doors, for example under a swimming pool.
16. But the main lesson is: don’t be this guy.
Everyone knows that cats are way smarter than we are, so if those kitties couldn't figure out how glass doors work, there's no hope for us.
Source: http://orzzzz.com/16-times-glass-doors-proved-to-be-too-confusing-for-all-of-humanity.html