I'm just plain mean
Ok, this isn't really mean but it's amusing.
I work in a small office and the girl that works here frequently forgets to turn off her little rock fountain before she goes home at night. If the water were to run out, the pump would burn out.
This afternoon, she forgot to unplug it again. She's going to be upset in the morning. I found a power cord that looks just like it, and plugged that in where her fountain is normally plugged in.
When she goes to plug it in, she's going to see that she left it plugged in but the water's not running and her precious little fountain will appear to be broken.
I have played jokes far more devious than this one but I thought I'd share it with you.
Share your stories.