John van Wisse was on pace to break the record for the London-to-Paris ultra-triathlon when he and his support team were stopped by United Kingdom border patrol officers in Dover after they received a call about illegal immigrants coming to the beach.
The police quickly realized their mistake and sent van Wisse on his way to complete the swimming portion of what is known as the "Arch to Arc" challenge, as it begins at London's Marble Arch and ends at Paris' Arc de Triomphe.
The Guardian reports only 13 people have completed the feat and van Wisse is still on track to break the record set by England's Mark Bayliss in 2012.
GALLERY: UNDERWATER PORTRAITS OF ATHLETES
Underwater Photos of Athletes
USA swim team
Members of the 2008 USA swim team: (from left): Garrett Weber-Gale, Ryan Lochte, Dara Torres, Aaron Piersol, Katie Hoff, Margaret Hoelzer, Cullen Jones, Natalie Coughlin.
Shaquille O'Neal in the pool at Miami's Mandarin Oriental Hotel in 2004.
Olympian Lolo Jones in 2012 with the United States flag.
Boxer Wladimir Klischko poses ahead of his unification heavyweight championship fight against Sultan Ibragimov, which took place in 2008.
Tennis pro Rafael Nadal of Spain takes a dive in 2007.
U.S. Olympic swimmer and Arizona student Amanda Beard engages in light studying at U of A's Hillenbrand Aquatic Center in 2005. She competed in her fourth consecutive Olympics in 2008, but didn't medal.
American swimmer Amanda Beard poses underwater.
Cal Ripken Jr.
Cal Ripken Jr. of the Baltimore Orioles plunges for a close-up in 1995.
University of Michigan student and Olympian Michael Phelps hangs out in an underwater study lounge in 2005.
Mark Spitz blows some bubbles in 1975.
U.S. women's water polo team
The 2000 U.S. women's Olympic water polo team with the flag.
Swimmer Summer Sanders before the 1992 Olympic games.
Francisco Pipin Ferreras, Audrey Mestre
The freediving husband and wife team of Francisco Pipin Ferreras and Audrey Mestre in 2000.
Billy May, Kristina Lum
The American sychronized swimming duo of Billy May and Kristina Lum, photographed during practice.
Water polo player Manuel Estiarte of Spain in 1996.
Seventeen-year old rising tennis star Tatiana Golovin of France hits a shot underwater in 2005.
NFL wide receiver T.J. Houshmandzadeh poses during a 2007 portrait session for the NFL Players Association.
Boxer Marcus Browne poses for an underwater portrait in 2014.
Thirteen-year-old American swimming prodigy Chelsea Chenault in 2008.
Chelsea Chenault in 2008.
Grand Prix swimmers
Swimmers in the warm-up pool look through an underwater window during the championship finals at the USA Swimming Grand Prix 45th Annual Santa Clara International Swim Meet in 2012.
Michael Phelps swims to his computer at Canham Natatorium on the Michigan campus in 2005.
U.S. Olympian Michael Phelps takes a dip in his tuxedo in 2008.
Michael Phelps in 2008.
American swimmer Dara Torres-Gowen underwater with the U.S. water polo team in 1994.
Water polo player Cassie Azevedo of Long Beach State poses during a 2005 portrait session.
Multiple arm wrestling world champion Ion Oncescu (right) arm wrestles underwater in Bucharest 2012.
World and Olympic champion swimmer Rebecca Adlington poses for an underwater portrait during a 2011 photo session in Nottingham, England.
- Brendan Maloy