The Sex Tape actress shrieked with laughter as show host Fallon explained the aim of the game: The pair had to race round the studio on wheeled inflatable kayaks, while dodging boulders, salmon, Hashtag the dancing panda and two Elton John impersonators.
Competitive Diaz zoomed away from the starting post, leaving Fallon to abandon his kayak and resort to throwing salmon instead.
In May, the crazy duo were part of a similarly wacky segment on the hit NBC show—photobombing tourists at The Top of the Rock in New York City.
And the comedic pair couldn’t even control themselves during the interview part of Diaz’s latest Tonight Show appearance. As the slender actress prepared to talk business, Fallon started spinning on his chair. Not to be outdone, Diaz, 41, crouched on the back of her seat then fell flat on the ground in front of her show host.
Eventually getting down to business, Fallon congratulated his buddy for looking so great. "I'm happy," the actress, who is currently dating Good Charlotte rocker Benji Madden, replied.
Click on the link above to watch Diaz and Fallon's bizarre kayak battle!