At work one morning, I was asked in chat for a way to edit an xml file on a Mac. They couldn't open it due to permissions. I told them to open Terminal and run sudo vi /path/to/file.xml. Never got a message back about it, so I assumed everything was OK. Later that afternoon, I received another question: "I'm in, I've made the changes, now what? How do I get out?" It wasn't funny until I realized how many memes existed for this. I'd imagined they'd quickly opened and edited it and spent hours unable to exit it; though, realistically, it probably wasn't attempted until the afternoon. Truthfully, I was new to it, too, and have no idea why I suggested vi over something else.