Saturday, 400 raucous Caps fans packed the downstairs basement of the Iron Horse for RMNB Party 10. But little did we know that a two-time Stanley Cup champion and Emmy-winning journalist would be randomly chilling upstairs.

NBC Sports’ Pierre McGuire, whom, sure, we’ve had our difference with in the past, came to the Iron Horse to grab a few drinks, catch the game, and check out the party.

After one of our readers tipped us off, Peter and I walked upstairs and introduced ourselves. We took a photo and posted it on Twitter. And then a steady stream of readers came up to meet Pierre. Like there was a giant line. He was literally the nicest person, taking photos, and talking hockey with anyone who greeted him.

But the best part came later.

Our new best friend Pierre is at #RMNBX pic.twitter.com/tfBR1IFK6U — RMNB (@russianmachine) February 4, 2017

I drunkenly met Pierre McGuire today at #rmnbx @rmnb_blog A photo posted by cjc_95 (@cjc_95) on Feb 4, 2017 at 3:01pm PST

When Pierre McGuire shows up to a @Capitals game viewing party #RMNBX pic.twitter.com/qlNQdIUc30 — carrie (@carabahniuk) February 4, 2017

Adam graciously buttoned up his coat so his Shut Up Pierre shirt was not showing.

Just met Pierre McGuire, extremely nice guy. Feel a little bad for hating him so much 😅. GUYS DON'T HATE PIERRE HES SUPER NICE! #CapsHabs #rmnbx A photo posted by Julie Fainberg (@shelteredlivin91) on Feb 4, 2017 at 12:22pm PST

@russianmachine Owen Johnson was always a great dodgeball sniper dating back to his days at Marshall University #RMNBX pic.twitter.com/mP1YxEto0Z — Owen Johnson (@OwenJohnsonsTwr) February 4, 2017

When you have to find out Pierre McGuire is an extremely nice guy when he drops by the #RMNBX party @manderfield91 @russianmachine pic.twitter.com/JAmdAa1a12 — Molly Astrid (@WeWillBonzai) February 4, 2017

Pierre said to me he will quit if the Caps don't win it all this year. #RMNBX @russianmachine pic.twitter.com/gm4P8FI5Sh — Stephen Luhman (@SLuhman) February 4, 2017

I knew that #RMNBX would bring people together. I never expected Pierre McGuire to be one of those people. @russianmachine pic.twitter.com/cUMSXTLUhr — #Munson2020 (@e_munson) February 4, 2017

Amazing time with @russianmachine today! Caps won and I met Pierre McGuire pic.twitter.com/NnVdPPteDs — neddy ballgame (@thenedbelliveau) February 4, 2017

That time Pierre showed up to #rmnbx A photo posted by Thomas Conner (@tconn1116) on Feb 4, 2017 at 11:40am PST

Ain't no party like a Caps watch party because a Caps watch party apparently has a surprise appearance from everyone's least favorite NBC commentator (and we all have a good laugh about it) thanks @rmnb_blog! #rmnbx #washingtoncapitals A photo posted by Missa (@missagoodier) on Feb 4, 2017 at 2:41pm PST

In the third period, Pierre ran down to the first landing of the stairs. And that’s when he began a loud Let’s! Go! Caps! chant with The Horn Guy.

Pierre just led #RMNBX in a "let's go Caps" chant. This is not fake news. — RMNB (@russianmachine) February 4, 2017

Yes, there is photo evidence.

That time I was in D.C. And Pierre McGuire started a let's C A P S chant. (He's in the Beanie to conceal his greatness.) A photo posted by Topher Gee (@wvugee) on Feb 4, 2017 at 1:29pm PST

To show Pierre how much we appreciated his participation, Sheena gave him an official RMNBX name tag, which he wore proudly.

It was around this time we began trending in Washington DC – a first for the blog.

CSN Mid-Atlantic’s Craig Laughlin even gave us a shoutout on air during the third period, which made our crowd begin yelling and clapping at the TVs.

What a party. We’ll have our full photo post tomorrow!