#heart: almost constantly pops or cracks their knuckles. never really loud but just frequently [kinda how he fidgets sometimes]

[sneeb-canons]

mind can rarely crack his joints bc his bones are metal and whatever and usually run pretty smoothly. but on the rare occasion that he can crack them. it sounds like the entire house is being torn apart by fireworks and violent explosions. his back snaps like a godsamn whip and his neck cracks so hard it's a surprise he didn't break his own spine. every single joint in his body will pop louder than anyone in the house has ever yelled, without fail.

he'll always make sure to do this in direct vicinity of both heart and soul because as he rearranges his internal structures they will stare on in sheer, absolute horror, especially considering that once he's done, he just continues on with his task as if it never happened and as if every atom in his body hasn't been split in two

Headcanon #632