Phelps swam a strong opening leg, setting an American record by touching in 47.51 seconds. Weber-Gale went even faster, going 47.02 and moving the Americans into the lead. But it looked like the American's chances at gold had slipped away when Weber-Gale passed off to Jones, who went 47.65.
Lezak dove in the pool .04 seconds after Jones touched the wall, a remarkable start considering anything under .03 results in a disqualification.
"I said before the relay we were going out there to swim a 400, not a 4 x 100 relay," Lezak said. "We're a team. It had nothing to do with individuals out there."
When Lezak touched the wall and then saw the Americans' time, he pumped his fist and slapped the water. Bernard hung his head, stunned at what had just transpired, and the United States kicked off what might go down as the most exciting celebration of these Olympics.
"When you put the world-record holder on the end of a relay, and you go in behind him, the chance of you beating him is slim and none," United States men's coach Eddie Reese said. "'Unbelievable' is the world I would use. That's the biggest word I know."
When Lezak climbed out of the pool, the four swimmers extended their arms into a giant group hug. Phelps had tears in his eyes, and his voice was hoarse from yelling so passionately, but he needed just three words to sum up his feelings.
"That," Phelps said, "was awesome."
What's Next for Phelps
TONIGHTEVENT: 200-meter freestyle
WHAT TO WATCH FOR: Phelps is the world record holder (1:43.86) and is nearly two seconds faster than the rest of the field. His closest competition, Pieter van den Hoogenband, dropped this event on the eve of the Games to focus on the 100-meter freestyle. This is the one individual event Phelps didn't win in Athens, so he'll be hungry to go fast and blow away the rest of the field. Phelps' training partner, Peter Vanderkaay, is the only swimmer with an outside shot at an upset.