Since a person cannot file a cake, I also gave my boss a silicon wafer with the letter of resignation on it. It seems mirrored due to the aluminum film on it. I acquired the skill to etch wafers like this in this job. (I didn’t etch this particular wafer, though. A special shout out to Samantha Cruz, who made this one and let my breastfeeding self avoid all the teragenic and mutagenic chemicals in the clean room!)
This is my practice of consciously creating the last act: if I were to never see my boss or my coworkers ever again, I have left them something unique that they can remember me by.