Yea Professor. Ya know, some time time it. even 2 sec is quite a bit of time. I would have a hard time believing that your not gonna have a lot more time than that unless your after one you wounded. I think that the damage that grizzly/ brown bears can do and the size the brown's can get has a lot of people believing thet are in dire straight's everytime they walk out the door in bear country. I really doubt that all that many attacks started form 40 yds off as some like to say either. Much more myth than fact about bears.
I lived in Alaska for several years in a fairly out of they way cabin. Never saw the first bear. They were around, I just never saw them. Guess they just weren't that hungry. Of course the first 5 or 6 mos, I carried a rifle everywhere I went just in case. Got tired of lugging it around. I'm not really a bear hunter.