If you hear someone behind shouting "first down" at Twickenham tomorrow it will probably just be Jack Bechta confused in all the excitement.
Bechta is an American football agent in England to scout talent at the Rugby World Cup. Rugby is advised to take him seriously. For Bechta is the man who has transplanted Jarryd Hayne from the league side Parramatta Eels to the San Francisco 49ers - and has done so in five months.
Bechta made this fantastical switch a reality; and not just as a place-kicker as Paul Thorburn believed was possible in the 90s, but as an actual player - as a running back in Hayne's case, who appeared in the 49ers' seasonal opener on Monday. His contract has opened a channel from league to the National Football League.
Is rugby next and will this World Cup be viewed as a watershed in the ending of the great transatlantic divide?
There have been union-NFL crossovers before but as yet not a big name. Bechta says that "Jarryd is a one-in-10,000", "a visionary" and warns that it would be tough for any other "rugby athlete" to emulate his feat.