Crying Wolf Will Make You Cry

(At my site, security guards work in pairs. On this day both of us have our personal computers out, which is against the rules, but a pretty common thing for all of us when the building is empty.)

Coworker: “Oh, ****, [Supervisor] is coming!”

(He pretends to scramble to put his computer away. I actually believe him and end up losing my work from unplugging my computer while hiding it.)

Coworker: “Just kidding! You should have seen your face. It was priceless!”

(I get my computer back out and about 20 minutes later actually do see our supervisor approaching the office on the CCTV.)

Me: “[Supervisor]’s here!”

(I actually scramble to get my computer hidden. My coworker thinks I’m paying him back for his prank and just laughs.)

Coworker: “Yeah, right. You’re gonna have to try harder than—”

Supervisor: *opening door* “What’s so funny? And don’t you know you’re not supposed to use your personal devices at work?”