By Christian Holub
April 04, 2016 at 07:01 PM EDT
Randy Holmes/Getty Images

Monday marked Robert Downey Jr.’s 51st birthday. The actor has a lot to be happy about; he returns to the big screen as superhero Iron Man in this spring’s Captain America: Civil War, which should give him a shot at topping Forbes‘ highest-paid actor list for the fourth year in a row. And according to a video Downey shared on Instagram, he is having fun with his birthday. Captioned “Rocky Mountain High 5.1 (Birthday Jam),” the video features Downey sliding across the snow on a tobaggan before high-fiving the camera into the ground — in slow motion, no less.

Watch the video below, and check out our gallery of Downey photos through the years here. 

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