It were the middle of the day, Rumble were just going at it in his workshop laying his back against a wheel board as he were slides down underneath vehicle. He were looking for the source of the problem, loosening some screw and bolts there and there doing some dismantling and what not til he would grab hold of a mechanism. Rolling out of it he would lift up the thing with a grunt, carrying it over the table infront of til he would drop it down. He let out of a huff, dusting off his hands some as he looks down at himself "ah great..." his shirt were all messy from this black tar that stuck on him so he were gonna have to keep it off for the meantime while worked om the problem here.
Kai heard the noise and saw the spirit-man working as he knocked on the door. Harmonic Convergence had changed all sorts of things and it seemed a spirit had merged with this man to make something new. "Hi, pardon me sir...Kai from the Air Temple? We ordered some more parts and I was sent by Tenzin to pick them up if they are ready."