So when I watched Earthlings and witnessed the birth of Smokey Quartz, I thought she's be just another Fusion. But during the fight, I noticed her habit of making puns, which reminded me a certain hoodie wearing skeleton. Hence them bonding over their use of puns to both ease tension and hide their insecurities. Meanwhile, their respective guardians look on in horror as the two exchange the punniest puns to ever be spoke.
Note: My exact words at the moment of realization was "holy shit, Smokey is Sans!"