Instructables
It's after noon and you're lost in a post-lunch stupor, too hazy to focus on work. What can you do to avoid dropping off into a full-on food coma? Sharpen your senses without straining you brain by assembling one of these quick and simple pen launchers from things you have lying about at your fingertips! Just don't get caught using them! You may need to wait until your stealth skills have regained their strength to avoid being disarmed.