"That's going to take a little while to sink in," said Holcomb, of Park City. "My world championship medal, it had been 50 years. My [Olympic] gold medal was 62 years. And now this never, ever. This is no years. It's going to take a little bit to sink in."
In the team event, Holcomb switched sleds and his brakeman and anchored the U.S. to another victory in 56.20 seconds, the fastest of the eight teams competing.
"This is probably the second-best day of my life," said Holcomb. "Just goes to show the depth of our team. Watch out, Sochi!"
Three years ago, Holcomb won the two-man bronze and four-man gold at worlds in Lake Placid on the track at Mount Van Hoevenberg.
This time, he surged past first-day leader Lyndon Rush of Canada with a near-flawless third run. Holcomb and brakeman Steve Langton had a four-run time over two days of 3 minutes, 42.88 seconds, putting them 0.46 seconds ahead of Rush and brakeman Jesse Lumsden.
"This is fantastic," said Langton, of Melrose, Mass. "This is my fifth year in the sport and I've had some good results, but to come out here and win my first big championship is pretty amazing. It's really indescribable."
Maximilian Arndt and Kevin Kuske of Germany took the bronze, 0.55 seconds behind Holcomb. World Cup champion Beat Hefti and Thomas Lamparter of Switzerland were fifth and John Napier and Christopher Fogt sixth for the U.S., which placed all three of its sleds in the top 10. Rookie Nick Cunningham and Dallas Robinson finished ninth.
"I'm at a loss for words," said Darrin Steele, chief executive officer of the U.S. Bobsled and Skeleton Federation. "It's been a long time for us. Holcomb's becoming a legend in his own right, and all these teams. It's just been an amazing race."
Before Sunday, the best the U.S. had done in two-man at the worlds was four silvers Stanley Benham (1950-51), Art Tyler (1957), and Gary Sheffield (1961). Since the discipline began at worlds in 1931, the U.S. also had collected six bronze medals.
"I guess the hard one's out of the way. We know we can do it," said Shimer, now the men's coach. "Coming in here we were confident, but you just never know. Things worked out. I can't say enough about Holcomb. He's just an unbelievably talented pilot. Anything you throw at him he seems to get it down the hill quick."
Piloting the sled Shauna Rohbock drove to the silver in the women's race at worlds last year in Konigssee, Germany, Holcomb drove USA-1 into contention for the gold on Saturday. He recovered from a shaky first run to finish the day second, just 0.12 seconds behind Rush.
Before he climbed out of the sled for the ride back to the top between runs on the first day, Holcomb already knew what had gone wrong and sent word: "Got it figured out. Time to make my move," he tweeted.
Holcomb cut Rush's lead in half with a sterling second run, the fastest of the 27 sleds that completed the run, and kept up the pressure in Sunday's first heat.
Rush slid first, getting the advantage of clean ice for being the first-day leader, but he bobbled in the tricky curve just past the midpoint of the 20-curve layout and finished the run in 55.86 seconds.
Next up was Holcomb, and after a strong start of 5.07 seconds the best of the heat he laid down a time of 55.54 seconds, the fastest of any team in all four heats.
That put the American duo in command with a lead of 0.20 seconds over Rush and 0.26 ahead of Arndt.
In the span of two runs, Holcomb and Langton had gained nearly a half-second on the Canadians. But this is a sport in which mistakes come swiftly.
"Need to stay focused and relaxed and do it again. The race isn't over," Holcomb tweeted before the final run.
Holcomb did just that, placing the finishing touch on the day with a final run of 55.63 seconds, beaten only by fourth-place finishers Francesco Friedrich and Marko Huebenbecker of Germany.
Bobsleigh World Championships Results
At Lake Placid, N.Y.
1. United States 1 (Steven Holcomb and Steve Langton), 3 minutes, 42.88 seconds (55.96-55.75-55.54-55.63).
2. Canada 1 (Lyndon Rush and Jesse Lumsden), 3:43.34 (55.71-55.88-55.86-55.89).
3. Germany 1 (Maximilian Arndt and Kevin Kuske), 3:43.43 (55.78-56.02-55.71-55.92).
4. Germany 3 (Francesco Friedrich and Marko Huebenbecker), 3:43.50 (56.12-56.03-55.74-55.61).
5. Switzerland 1 (Beat Hefti and Thomas Lamparter), 3:43.74 (55.94-55.96-55.90-55.94).
6. United States 2 (John Napier and Christopher Fogt), 3:44.12 (56.04-56.10-56.05-55.93).
7. Germany 2, (Manuel Machata and Andreas Bredau), 3:44.28 (55.98-56.09-56.17-56.04).
8. Latvia 1 (Oskars Melbardis and Daumants Dreiskens), 3:44.34 (55.96-56.05-56.16-56.17).
9. United States 3 (Nick Cunningham and Dallas Robinson), 3:44.35 (56.29-55.92-56.15-55.99).
10. Switzerland 2 (Gregor Baumann and Alex Baumann), 3:44.46 (56.09-56.10-56.24-56.03).
11. Netherlands 1 (Edwin van Calker and Sybren Jansma), 3:44.49 (56.29-56.29-56.00-55.91).
12. Romania 1 (Nicolae Istrate and Florin Cezar Craciun), 3:45.02 (56.37-56.41-56.12-56.12).
13. Italy 1 (Simone Bertazzo and Francesco Costa), 3:45.21 (56.55-56.34-56.51-55.81).
14. Monaco 1 (Patrice Servelle and Lascelles Brown), 3:45.54 (56.35-56.28-56.72-56.19).
15. Latvia 2 (Edgars Maskalans and Intars Dambis), 3:45.63 (56.29-56.63-56.49-56.22).
16. Russia 2 (Alexander Kasjanov and Maxim Belugin), 3:46.33 (56.60-56.76-56.61-56.36).
17. Canada 2 (Justin Kripps and Derek Plug), 3:46.42 (57.03-56.53-56.75-56.11).
18. Czech Republic 1 (Jan Vrba and Jan Stoklaska), 3:46.75 (56.64-56.68-56.95-56.48).
19. Russia 3 (Nikita Zarharov and Maksim Meleshkin), 3:46.97 (56.73-56.83-56.87-56.54).
Britain 1 (John James Jackson and Bruce Tasker), DNF.
Russia 1 (Alexsandr Zubkov and Dmitry Trunenkov), DQ.
Netherlands 2 (Ivo de Bruin and Bror Van der Zijde), DQ.