Jimmy Fallon submits to Ronda Rousey in six seconds (VIDEO)

Last month a video of Ronda Rousey busting some web show dude's ribs with a judo toss made the rounds and should have put all television hosts on alert.

Anyway, on Tuesday’s episode of The Tonight Show Starring Jimmy Fallon, the MMA fighter known as "The Arm Collector" demonstrated how easily she could go about snapping one with her signature move — the arm bar.

And the perpetually grinning Fallon used himself as the practice dummy.

Before Rousey's “armbar” demonstration began, Fallon chose “Rumpelstiltskin” as his tap-out safe word. 

"Your arm doesn’t go beyond 180 degrees,” Rousey explained before grabbing Fallon's wrist. “It doesn’t take a lot of pressure [to break it], you just push it right at the elbow joint."

Well... you can guess what happened — all in six seconds.

“That was scary,” Fallon said afterwards. “That’s like putting your head in the lion’s mouth.”

Stick to those cutesy duets with starlets Jimbo.