Today I was sending an email from Hotmail, Microsoft’s email service. Upon clicking the send button, the following message loaded:
Apparently it found the word attachment, and since I didn’t have any attachments with my email, it asked if I want to add any before sending my email. It’s a pretty neat addition to Hotmail which I will surely find very useful 
It’s not the first time that I received a reply like “What attachment?”! So kudos to the Hotmail team 