How fast can a grizzly cover 50 yards?

Grizzlies are strong runners, which is one of the reasons the U.S. Fish & Wild Services advises those encountering them to “never run from a bear.” The large mammals can cover 50 yards in just three seconds, running as fast as 40 miles per hour.

YUP, they are a bit quick..

Been charged twice by a black bear.. much smaller, still, once it was over.. Can not explain the rush of adrenaline one gets unless you've been there.. similar to when the tuskless cow charged in Zim and stopped at 8 yards.. also a bit of a rush...

I was with the late Ian Gibson at the time..