Naw, gravity exists. In this form and in the figurative. Afterall, how does one fly? By throwing oneself at the "earth" and missing.
Tell us... how well do you bounce?
And I'll agree, common sense isn't. Why do you think that yolo craze started? It wasn't a case of thinking outside of the box, it was a case of not thinking.
Then again, that line made me think of a new T-Shirt for Dr. Who. Have a picture of the TARDIS, preferably open, and have the caption state "Why think outside the box?"