Whatever you do, don't press it.
Do Not Click the Sus Briefcase is a tiny game of pure reverse psychology. There is one sus briefcase on the screen, it is clearly labelled "DON'T OPEN", and your one job is to absolutely not press it. You will press it. …
1. Do NOT press the sus briefcase. (You will. It's fine.)
2. Click or tap the button, or press Space, to trigger a chaos event.
3. If it runs away, chase it with your cursor or finger to catch it.
✦ One forbidden sus briefcase you are absolutely not supposed to press
✦ Eight escalating chaos events: shake, multiply, run away, fake errors and more
✦ A button that panics and flees your cursor so you have to chase it