And now it's time for who's smarted.

Wait, hold the door.

Just made it.

Thanks for holding the door for me, smarty pants.

Although I am a little surprised to see everyone crammed in together on this elevator.

Got room for one more?

Good.

There, no problem.

Oh, wait, small problem.

I can't reach the buttons.

Um, 42, please.

Going up.

Ah, up we go.

You see, I just received an email saying there'd be free pizza on the 42nd floor of this building, the world-famous Samarty Tower.

I could take the stairs, and that would be good exercise, but I'd probably be so winded from climbing 42 flights of stairs that I wouldn't be able to breathe, let alone eat pizza.

Besides, elevators like this one exist precisely for moments

like this. In fact, we wouldn't even have tall buildings like skyscrapers if it weren't for

elevators. Third floor. These days, as you probably noticed, elevators are everywhere, from big

cities to small towns. Every day, people take over 325 million elevator rides,

and over the course of three days, elevators carry nearly 8 billion passengers. That's like carrying

every single person in the world in just three days.

7. Smarty pants.

...