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Zac Efron is fearless.

In fact, when he appeared as a guest on NBC's The Tonight Show Monday, the We Are Your Friends actor agreed to play a game of "Egg Russian Roulette" with host Jimmy Fallon. The rules were simple: in a carton of one dozen eggs, eight of them were hardboiled, and the remaining four were still raw. Efron and Fallon would take turns smashing eggs on their heads, and the first to get two raw eggs would lose. Before choosing his first egg, Efron admitted, "I feel like I'm in the last scene of Deer Hunter right now." Fallon assured the actor that his game was "more fun."

Efron was confident about his first selection. "You can kind of tell," he said while shaking the egg. "I'm pretty positive that this one is..." Fallon cut him off, shook his head, and told the actor, "You can't tell." As it turned out, Efron was right.

After Fallon picked up his first egg, he admitted, "It kind of feels like there's something goopy in here." Fortunately, he'd chosen a hardboiled one, too. Efron knew he was in for it after he decided to pick up his second egg without looking. "Oh, I know that this one's wet," he said. "I already know it's wet. I just...I can tell." Before cracking it on his head, he said, "I loved this suit before."

There was even a slowmo replay.

Fallon lucked out on his second try. He wasn't always so fortunate, though.

"You have so much egg on your face—literally and figuratively," Efron said.

To see who won the game, watch the video above.

Earlier in the episode, Efron also opened up about his encounter a wild tiger shark.

In the midst of filming Mike and Dave Need Wedding Dates in Hawaii earlier this summer, Efron invited co-star Adam DeVine to go on a shark dive at 4 a.m. local time. "I was out there for maybe about 45 minutes, and all of a sudden, out of nowhere, all of the Galapagos sharks—which are like the 7-to-10-foot sharks—just dived. They just disappeared. That means an apex predator is above them so they're clearing the waters for a bigger shark. So I kind of go, 'What's going on right now?' I turned left and I see about a 14-foot tiger shark...swimming towards me," Efron recalled. "I had two choices. The boat was behind me and technically safely behind me, and so were several people yelling, 'Come this way! Come back!' It was all just visual at this point. He came straight at me—or she came straight at me—and what you're supposed to do is just slow down your heart rate and just stay calm. I held my breath, I crossed my arms and I let the shark know that I wasn't prey. I just sort of stared into its eyes—I'm not joking!"

To Fallon's horror, Efron revealed that the shark indeed swam in his direction. "It was swimming towards the boat, which was where I needed to get back to," he said. "I don't know what happened, but I guess I really like to charge life, so I just grabbed onto its fin and rode it all the way back to the boat."

Efron even had a picture to prove it.

"I don't recommend doing that at all," Efron said. "Do not do this at home!"

Didn't get enough Efron? Watch a trailer for We Are Your Friends, in theaters Friday:

(E! and NBC are both members of the NBCUniversal family.)