What to do if attacked by a black bear or a brown bear? (feat. U.S. National Park Service)

‌What if a black bear or a brown bear (= grizzly bear) attacks?
The U.S. National Park Service provides the following guidance:
If a black bear charges and attacks, fight back with everything you have using all available means!
Never play dead.
Directly punch or kick the bear in the face, and defend yourself using any weapons nearby, such as rocks, sticks, or bear spray.
Summary: Black bears are manageable, so try to fight them off.
If a grizzly or brown bear charges and attacks, play dead.
Do not fight back!
Protect your head and neck with your hands and arms.
Lie flat on your stomach with your legs spread apart.
Keep your backpack on, as it can help protect you from the attack. Do not move and do not make any noise.
You must make the bear realize that you are not a threat to it or its cubs.
Do not get up immediately just because the attack has stopped, as the bear may still be lingering nearby.
You must wait for several minutes until the bear has definitely left.
Fighting back against a grizzly/brown bear attack usually makes the situation worse, but if the attack does not stop and continues, fight back with everything you have using all available means!
Summary: You'll die if you fight back anyway, so just play dead. But if you feel like you're actually going to die, then try fighting.

Bear Attacks (U.S. National Park Service)
nps.gov
Understanding the bear’s behavior can make the difference between life and death.