Lots of workplaces use Slack as a form of communication.
So what better way to terrify absolutely everyone than to dress as a walking, talking reminder of the terrible, dark nine-to-five?
Twitter user Alex Novemberg did just that for Halloween.
Dressed in a t-shirt with the slack colours and a spine-shivering black ‘s’ planted in the middle, he even managed to nail the sound made when you get a new message.
It's so meta.
Needless to say, people were terrified.
Others were impressed by the simple genius of the costume.
Stomach-churning anxiety is the reaction you want to your Halloween costume tbh.
Even Slack was on it...