Two mountain bikers from Slovakia got a more extreme experience than they expected this week, and the frightening video of their encounter is going viral.

DuÅ¡an Vinží­k was biking with a friend on a mountain course in Malino Brdo when an unwelcome guest joined them on the trail.

Luckily no one was hurt, but after watching the footage Vinží­k uploaded to YouTube you'll wonder how these two didn't have a heart attack.

After all, it's not everyday you come face to face with a bear.

Bears are intelligent creatures, and they won't mess around with people if they can avoid it, but in the forest anyone who gets too close is fair game, and these two bikers were lucky they didn't become a snack.

Then again, maybe the animal just wanted to say hello and cuddle with the athletes. After all, it's not everyday that a pair of mountain bikers go tearing through your home, so you can't blame him for wanting to investigate.

Anytime you manage to snap a picture of a bear it's bound to be a memorable experience, but people are obviously impressed with Vinží­k's video because it has racked up more than 4 million views in  just a few days.

What would you do in a situation like this? I wouldn't find myself on an extreme mountain biking course in the first place, but if I was and a bear charged at me I would probably fall off my bike.

Knowing the adrenaline-junkie type, Vinží­k was probably back in that bike park just days later, but you couldn't get me back on that course if you offered me a million bucks!

Share this scary chase with someone you know!