Andrew Luck was standing on the sideline at Lucas Oil Stadium on Saturday watching his Indianapolis Colts teammates play the Chicago Bears in a preseason game when the stunning news broke that the QB was retiring from the NFL.

Which makes this crazy news even more insane.

There was the 2012 No. 1 overall pick, standing and laughing with teammates while fans around the stadium must have been learning about the news that will most likely rock this franchise for quite some time.

How surreal must that have been for those fans who thought they'd just have a little fun at a preseason football game?

Well, after learning the news some fans booed their (now former) QB as he left the field:

"I'd be lying if I said I didn't hear it," Luck said of the boos during the postgame press conference where he confirmed his decision.

"It hurt."

This whole thing is wild.

Contributing: Indianapolis Star