imprison your boss

Has your boss been making you work harder than you deem apropriate? Is he slacking off and making you do some of his work? Well then, pull this off and make him or her stay more time at work. The only problem is that once they figure out how to get out, you might not work there any longer (if they find out it was you).

Note: Do not try to lock your boss at work (unless he really is a prick). I was only kidding.