There's this stairwell at the CN Atlanta studios. creators of content for CN/AS are invited to draw on the walls of the stairwell, as decoration, so that they leave a piece of themselves with the studio.
Back in the early 00's, AS was just starting up. Cowboy bebop was the first anime to be introduced to the channel. As such, Toshihiro Kawamoto, the animation director and character designer of Cowboy bebop, was invited to the studios. While there, he drew the pencil drawing of Spike Spiegel underneath the sharpie one in the pic. Kawamoto is a highly respected artist and his sketch on the wall was considered one of the best there.
Fast forward to 2015, some dumbass intern decided that that old pencil sketch was clearly the work of some amateur, so he (she? dunno) decided to draw their own little masterpiece right on top of Kawamoto's.
Naturally, /a/ and /co/ both freaked out. There was even some limited coverage in other outlets.
don't know what happened to the intern