GossipCop.com has reported that Justin Bieber is now explaining the reason for his "stumbles" the night he was arrested for DUI...apparently, his FOOT was to blame!

Bieber claims that those pins and needles are the main reason he was stumbling around while taking the sobriety test.

According to Miami Beach police documents released yesterday, Justin told cops at the time that he had fractured his right foot in a skateboarding accident a few months before.

His blood-alcohol level was under the legal limit, but he did test positive for Xanax and weed. Bieber has pleaded not guilty to DUI. 

What do you think really happened?

SOURCE: Gossip Cop  PHOTO CREDIT: Getty Images