I was working customer service, and part of my job was to answer any incoming phone calls. We got a call from a guy claiming to be from technical support. He told me that he wanted to update our systems, and to do so, I needed to follow his instructions. I obviously knew this was a scam but decided to play along. He told me to log in to our computer, ring up a gift card for $100, say he paid cash, then read off the gift card number for him. He said that would update our systems! Still the funniest scam attempt I've ever seen