It won't be a boring day. Startling, for sure: shocking, maybe. But definitely not boring, humdrum or run-of-the-mill. Your first surprise will likely arrive via either a coworker or someone else you see on a daily basis. Either way, they won't be acting even remotely close to the way they usually do. Of course, you being you, you'll enjoy the change: and encourage it. Hey, it's your job to be a sparkplug. Might as well have fun with it.