Some days ago, I was trying to get in touch with a friend of mine. I checked my instant messaging client and noted that he was online. I sent him a “Hi” and immediately received an offer to download a large
.zip file with a business-related name.
The explanation? He was doing a drag-n-drop operation on his desktop when my message popped up on his screen right under his mouse. The drag-n-drop was interrupted and the file was dropped on the message window. His IM client recognized it as a voluntary “send file” operation.