The Buffalo Bills held their Blue & Red practice at Highmark Stadium on Friday night and fans showed up in a big way.

More than 50,000 Bills fans packed Highmark Stadium for the Return of the Red and Blue practice, and one big reason made it bittersweet.

Here are three observations from the eighth day of Bills training camp: As usual, but it's still worth noting, it was a huge showing by Bills Mafia. Nearly 40,000, Bills fans made it out to Highmark Stadium and filled the lower bowl of the stadium.

I want to start by saying that I fully understand it's just a practice and a helmet. Now that I've got that out of the way, let me enjoy things. Buffalo Bills QB Josh Allen has a wonderful history of showing up to the Blue & Red practice in his own unique way.

The Bills will return to Highmark Stadium for the first time this year for the annual Return of the Blue & Red practice. It also means the return of Bills Kickoff Live.

The Buffalo Bills held their annual "Return of Blue and Red" training camp practice at Highmark Stadium on Friday. It was Day 8 of camp but different than the others. Why? Well the attendance tells the story.

Following warm-ups and 7-on-7 drills, the Buffalo Bills deployed Mitchell Trubisky as QB1 on Friday evening at Highmark Stadium

The Bills have returned to Highmark Stadium for practice and Josh Allen ran onto the field wearing a throwback helmet as "Mr. Brightside" blared.