Well it's still something, i've never heard of a gorilla surviving a gunshot to the head.

The Russians were scared of bears because their guns were almost useless against them.

Can I have some sort of proof of that? I can say that people in Brazil are terrified of Gorillas, but that doesn't make it true.

You wouldn’t want to share a gorilla’s dinner. Unless, of course, you like the taste of baby insects called grubs. Gorillas also eat leaves, bark, shoots, stems, roots, flowers, and fruit. Some gorillas also eat adult insects, such as termites.

In the southern states and other areas, American Black Bears eat many different types of foods that people also eat, including fruits such as blueberries, blackberries, apples, and peaches. Black bears also eat small animals, but they account for only about 10% of a bear's diet.

An adult male gorilla weighs about 300 to 500 pounds.

adult males (black bear) typically weigh between 125 and 550 lb, It depends what season though.

There are at least three cases on record of gorillas learning sign language and communicating with humans. So I'd say they are very smart, at least as smart as a young child. They may not have philosophical-type thoughts or be able to write but they communicate clearly.

Polar bears are just as smart as apes, according to research scientist Alison Ames. Their success at hunting seals may be a sign of their brain power.

I have to ask what type of lift you are asking. Is this a deadlift, a military press, or a 1,000 lb "budge"? Two of the three should be possible for a gorilla.
Depending on the rules, the human record deadlift is near/somewhat over 1,000 pounds. A gorilla is considerably stronger than a human, though experiences none of the conditioning of a weightlifter.
A "budge" of the weight would be easy, i.e lift it at all. The human backlift record is over 2 tons.

A brown bear can hook his long front claws under a slab of rock that 3 grown men can not lift & flip it over almost effortlessly.

A bear, which can be twice a gorillas size. It would just claw the gorilla and a deadly bite. The gorilla how ever will put up a good fight. It won't be easy. If the gorilla does try and headlock the bear it risk a powerful bite from the Bears mouth. Remember that the bear has a short neck. The bear can also stand taller.

And to make this question easier you should say what type of bear.

If a polar bear or grizzly bear most definitely yes

If a small 200 pound black bear , not very likely

It also will depend if the gorilla is male or female, but if we are talking male animals, a 200 pound male black bear can not beat a 500 pound silver back male gorilla. How ever a 500 pound Silver back male gorilla can not defeat a Polar Bear or Grizzly. They are faster, it would claw the gorilla to death and a serious bite. How ever the gorilla can still do some damage. This would definitely how ever be a good fight.
Source(s):
Zoologist

The reason the Russians weren't killing the bears was because they'd always shoot at the bears head, and the bears skull was thick enough to stop bullets.