I run a small Wordpress site for one of my clients. Recently, they got a new business partner. This is how our first conversation went:
New Business Partner: Hi! I'm looking forward to working with you. I know my way around Wordpress, so we won't bug you with every little thing from now on!
Me: Hi! It's nice to meet you!
Literally five minutes later:
New Business Partner: I'm so sorry, it looks like I broke the whole website.
He actually did.