This chilling footage was captured by Dusan Vinžík as he was biking through the woods behind his pal. The bikers were heading downhill through the woods at the ski resort Malinô Brdo in Slovakia. Out of nowhere a huge brown bear leaped from within the woods and charged towards them. Dusan and his pal make a narrow escape, as brown bears are known for running at 21mph. They uploaded this nail-biting footage onto youtube, to show others how dangerous it can be.