During the 2012 SXSW performance in Austin, fans were already fired up as 50 Cent took the stage, then, without warning, Eminem appeared.
The reaction was immediate. The crowd erupted as two of the biggest names in hip-hop suddenly found themselves on the same stage, performing one of Eminem's most iconic tracks together.
For fans who had heard "Till I Collapse" countless times, seeing Eminem and 50 Cent perform it together in front of a live crowd was the kind of moment that instantly became unforgettable.