50 Cent may have lost a bit of weight for his latest movie role, but the MC is still a force to be reckoned with. A fan in Angola appears to have learned that lesson the hard way recently when he jumped onstage during a G-Unit show in the African nation and snatched 50's chain from his neck mid-song.

On shaky video captured by a fan, an unidentified person can be seen climbing onstage, ripping what appears to be a chain from 50's neck and then jumping back into the crowd. The music stops almost immediately and the crowd can be seen surging back and forth as it appears the culprit is making his way to the back of the venue.

On Monday, the matter was addressed on 50's personal Web site, ThisIs50: "Recently 50 Cent, Lloyd Banks and Tony Yayo were performing in Angola, Africa. Being that security was limited, fans were able to interact with the group on stage. However one fan had a different motive, and bit off more than he can chew, as he attempted to run up on 50 and snatch his chain."

According to the post, "50 pushed him off the stage and jumped into the crowd and then all hell broke loose." The site promised more on the incident soon, including live footage from the chain grab.

An unnamed G-Unit insider reportedly told TMZ that what isn't seen in the fan video was that 50 jumped off the stage, "and punched the man who tried to jack him." The insider also reportedly said, "The chain is around 50's neck right now."

(For more on 50's recent trip to Africa, head here and here.)

A label spokesperson for 50 had not commented on the matter at press time.