Ah, so that’s why Justin Bieber was so upset this morning. A video of Bieber’s confrontation with London paparazzi has made its way online, and it shows Bieber screaming obscenities and threatening a cameraman after the man said, “F**k off back to America.”

“What the f**k did you say?” Bieber yells back at him. “What’d you say? I’ll f**king beat the f**k out of you.” His security guards then try to put Bieber back into his SUV, but not before he shoved the paparazzo.

That explains why Bieber went on a mini Twitter rant earlier in the day that now explains his actions.

“Ahhhhh! Rough morning. Trying to feel better for this show tonight but let the paps get the best of me…” he tweeted. “Sometimes when people r shoving cameras in your face all day and yelling the worst thing possible at u…well I’m human. Rough week. Not gonna let them get the best of me again. Gonna get focused on this show tonight. Adrenaline is high now. Gonna put it on the stage. Only way someone can break u is if u let them.”

Posted by:Terri Schwartz