Two mountain bikers had a scary close encounter with a grizzly bear sow that charged at them while riding the trails of Jasper National Park in Alberta, Canada. If you watch the video closely you can see the bear(s) appear at 0:34, 0:40 and 2:40 mark. Feel free to skip everything between 0:50 and 2:00. I recommend viewing it in full screen and 720p:
A stray dog nicknamed Xiao Sa has been following a team of cyclists for 24 days along a 1700km race across China from Sichuan province to Tibet.
Moose are usually not aggressive animals, but mother moose will protect her young and charge you if you cross her path like these cyclists did at Kincaid Park in Anchorage, Alaska.