Quincy Hall became the latest American to electrify Olympic track and field with an out-of-nowhere comeback, sprinting from far behind in the 400 meters Wednesday night to reel in three runners and capture another gold medal for the U.S. Hall, buried in fourth place as the sprinters rounded the last bend, outran the runner on his outside, then two more to the inside to cross the line in 43.40 seconds, the fourth-fastest time ever. He dropped to the track to do snow angels to celebrate. Hall beat Britain's Matthew Hudson-Smith by .04 seconds — that's now the fifth-fastest time in history — and Muzala Samukonga of Zambia finished third. Hall is the first American since LaShawn Merritt in 2008 to capture gold in the one-lap race. His victory came an evening after American Cole Hocker came from far behind late to beat the favorites in the men's 1500.