Burt is a Slave Driver Crewneck Sweatshirt

80s cult classic zombie movie The Return of the Living Dead, When two bumbling employees at a medical supply warehouse accidentally release a deadly gas into the air, the vapors cause the dead to rise again as zombies. But in Berts Office is this eye test chart that the employers made for fun. The eye-test poster (seen most clearly after Frank and Freddy run into Burt's office after hearing the first re-animated cadaver) in Burt's office actually reads "Burt is a slave driver and a cheap son of a bitch who's going bald too haha" if you put the letters together (pause the Blu-ray at around 17:29 into the movie for a clear shot).