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There will be water: Jake Gyllenhaal goes to war with Jimmy Fallon on 'Tonight'

Anyone who sees Jake Gyllenhaal's new movie "Nightcrawler," in which he plays a scary sociopathic cameraman, would not start a battle with him on a whim. Yet that's exactly what "Tonight Show" host Jimmy Fallon did Wednesday night: He declared war.Water war, that is!Sitting across from one another, both Gyllenhaal and Fallon got chances to splash each other based on the draw of a card, with the wi
Jake Gyllenhaal and Jimmy Fallon
YouTube

Anyone who sees Jake Gyllenhaal's new movie "Nightcrawler," in which he plays a scary sociopathic cameraman, would not start a battle with him on a whim. Yet that's exactly what "Tonight Show" host Jimmy Fallon did Wednesday night: He declared war.

Water war, that is!

Sitting across from one another, both Gyllenhaal and Fallon got chances to splash each other based on the draw of a card, with the winner taking over the loser's kingdom and gold reserves.

Well, not exactly. The winner actually got an extra chance to douse the other with more H2O. All in good fun. And after initial skepticism, Gyllenhaal got really into things: "This game is totally fixed!" he cried after a particularly large dunking. But later, he lifted Fallon's jacket to pour a full glass down his back.

Check out the video for all the pulse-pounding suspense, and to find out who won. And after you towel off from that, watch Gyllenhaal's much drier interview, where he talked about his upcoming Broadway run in "Constellations" and how his sister Maggie's new play (with Ewan McGregor), "The Real Thing," was about to open on the Great White Way.

Gyllenhaal admitted his sister got skittish knowing he was in the audience watching her during previews. "She didn't want me to see her in the show," he explained. "If she wouldn't let me see it, at some point I was going to sneak in. But she can like smell me, my sister. My sister would be like," he made a sniffing noise, "'My brother's here.'"

Jake Gyllenhaal with his big sister Maggie Gyllenhaal in May.Dimitrios Kambouris / Today

Still, he's super-supportive. "I'm biased, but I'm kind of not, because I'm her little brother. So I've got to be tough, but she's pretty extraordinary."

"Nightcrawler" opens in theaters on Oct. 31; "Constellations" opens on Broadway in 2015.

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