Confused

I'm pretty sure that someone stole the manual stapler in my computer lab. I was sitting at my laptop, and this girl came up to print and then staple what she had printed. I wasn't particularly paying attention to her, but I thought I saw her holding something other than her printout. She walked out. A little while later, I processed what had just happened. The manual stapler was gone. What is that all about? I mean, come on! A stapler? Of course, by the time I realized what had happened, it was too late to do anything. People baffle me.