Have you ever been against a friend in normal matchmaking?

So, I wasn't sure exactly where to post this, but I guess this will do for now. So, around a week or two ago me and a friend had queued for a game. After a few long minutes, we found and accepted one. When we were in the loading screen we didn't notice, but as soon as we got in game I saw in chat a person said "Hey, Kie" (And by the way, because many people get it wrong, that "Kie" there is pronounced as "Key"). I was confused for a second, but then I realised the name. This person that said that was a friend who I had on league of legends, and had known for a month or two. To top that, he had also queued with 2 others that we also knew. I have to say, when I noticed and the friend I had queued with noticed this, she and I were both shocked massively. And we just kept saying things like "What are the chances?!" etc. So basically, has this ever happened to you before? And if so, does anyone know what are the chances to go against your friend in a normal matchmaking? Little note; We won. I also have proof, I had recorded the match.
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