Kids have been trying for ages to figure out how Santa slips into their house on Christmas Eve. Now they have the answer: Santa knows parkour.
Parkour professional Ronnie Shalvis put on the red suit and beard to recreate a typical work night for old St. Nick — if his journey from rooftop to rooftop involved flips and jumps instead of the help of a magical sleigh.
See also: Mario and Luigi Would Be Parkour Experts in Real Life
So if you happen to see Mr. Claus this year and he looks slimmer, it's probably all the cardio.
BONUS: 9 Ways to Make Your Christmas Card Unforgettable
Image: Flickr, Sam Howzit