You shouldn't creep your coworkers out while they are working.
Josh has planned a prank for his coworkers on Halloween.
Josh wants to give his coworkers a fright.
Josh plays a prank on his coworkers as they are leaving work for the night.
Josh plays a Halloween prank on his coworkers while they are making a presentation to a client.
Josh gets his coworkers to laugh at his successful prank.
Josh gets censured for potentially derailing an important meeting.