So yeah, this is one of the weirdest stories ever. Keyshawn Johnson and Eric Dickerson both think singer Justin Bieber drives too fast. Dickerson merely tweeted about it; Keyshawn took it to another level, per TMZ:

Sources tell us ... Keyshawn -- a former NFL superstar -- had just left a party Monday night inside of his exclusive gated community in Calabasas (with his child in the car), when Bieber zoomed by in his Ferrari at breakneck speeds.

We're told Keyshawn was furious -- feeling Justin could've killed someone -- so he brought his kid home, then chased after the singer in his Prius (yes, a Prius chasing a Ferrari).

When KJ got to Bieber's pad -- he blocked Justin's Ferrari in the driveway and got out of his car to confront Justin face-to-face ... but Justin ran inside of his house and refused to come out.

Have to love any story in which Keyshawn is the voice of reason.