beavers can definitely startle people...I have seen it numerous times. I will never forget the time in college when we were camping and drinking beers and the beaver...approximately 15-30minutes after we saw him(or her) at a distance swimming across the lake(big beaver)...ambushed the fish tied to a stick but still in the water. All four fish disappeared within seconds and it the sound of the splash and commotion was very loud plus literally right next to us.
NRA Distinguished Life Member
"Abraham Lincoln freed all men, but Sam Colt made them all equal." (post Civil War slogan)