Last night was Summer Jam, the sprawling rap concert hosted by New York radio station Hot 97. Over the years, the event has earned a reputation for sparking unexpected moments, but last night 50 Cent may have topped them all. While he was performing his set, 50 had a rival robbed onstage, all while he was still performing his hits.

You can see footage of the incident above. With rapper Fabolous—who had been brought onstage by 50—in the foreground, a number of men snatch and grab at a man outside of the frame. One man in a white t-shirt and Yankees hat comes up from the fray with a large chain in his hand before turning his back.

The man who had his chain taken is believed to be Slow from the duo Slowbucks, whose beef with 50 stems from the below photo they posted to Instagram with 50's estranged son Marquise.

That chain then ended up on 50 Cent's neck as he continued to perform.

LMAO wow 50 Cent really did rob Slowbucks chain and wore it right after robbing him in front of 80,000 people pic.twitter.com/OBXrKT4NYk — Quake (@QuakeDHH) June 2, 2014

This will almost certainly be the most memorable part of the careers of either rapper from Slowbucks, which seems unfortunate for them. It probably bears worth mentioning here that one of 50's most well-known songs is called "How to Rob."