Poltergeist!

An email to the helpdesk:

While working this am, I turned away briefly from my computer and when I looked back 2 screens were open that I had not opened. Both were Microsoft Office. One was blank and the other showed a [document]. [Coworker's name] was not responsible for this form. [sic] I made a copy of it then closed the 2 open screens. Any idea how this came to my computer?

Well, yes, we have an idea, but we'll keep it to ourselves...