So to get his attention, I switched to my word processor, typed a long message, copied it to my clipboard, copied my clipboard over to his clipboard, and pasted the message into his active window.
Exploiting the preview pane feature in Microsoft's Outlook e-mail program (which allows users to see a message in a small window before they open it) BubbleBoy can infect your PC even if you don't open the attachment it is hiding in.