In this episode, Kara is regaling everyone with stories revolving around people in history who ever tried to "elevate" their lives with gun powder that China invention in year... ... ... something or something.

Anyways, humanity (at least the bros out there) have tried to utilize explosives to achieve new heights and other interesting things at the expense of blowing themselves up in the process. 

So listen in because we also brought Deja back and we don't think she's going away anytime soon. Deja has a knack of dissolving Kara and Ed's nerdiness to make it palatable to 99% of the world's audience. This really applies to Ed's droning on and on and on about "sciencey" things.