Thundercracker might notice how Barricade's desk as well as some other of his things are still there and untouched, but nonetheless are being kept clean. Knock Out would hardly call himself a sentimental mech but he did have respect for those who he considered his friends and the memories shared.

When the medic came back he did not only bring the tools he needed but also a small blue and orange dragon perched between his big shoulder and neck. It flied in front of Thundercracker once the seeker sat down, as if he was keeping an eye on the newcomer to make sure he didn't try to do anything weird to his master.]

Relax, will you? [Knock Out said as he started to work.] If you change your mind I'll put them back, no questions asked.