It's Friday! And, everyone likes to loosen up, at least in our teams mostly consisted of young professionals.
Do you have any trollers in your team? What are the funny misdemeanors you had your team members do?
In our organization, we have a simple rule that you learn pretty fast. Never step away from your unlocked PC. What follows is usually one of the next:
1. Fake Windows Update ran fullscreen from your browser. Hillarious when reaches over 100% and when the victim starts calling colleagues to see this exceptional situation with his update. Guaranteed fun!
2. Head of Office sending email from victims PC to himself as a Letter of Resignation. A few hours later, Head of Office calling the victim for a conversation about the email and his expression to leave the company. You can imagine the expression on victims face and the wrap-off when realizing it's just a prank 
Other types of Friday fun mostly goes to regular sharing of Rebecca Black - Friday video and other similar trolling vids.
Tell us about your Friday fun! Share the ideas, let's collaboratively troll! 