If you are confronted by an assailant who is much larger than you, and you likely don’t have the ability to knock them out, then you want to target their most vulnerable areas.
These are the eyes and the groin. In the video below I cover a tactic to attack the eyes that Lee Morrison of Urban Combatives refers to as the Rapid Eye Blitz.
This can be particularly effective if you are you some fingernails to work with. The idea is to cause some tissue damage to the eyelids, perhaps the eye itself, and slow down your attacker so you have a chance to escape.
Check out the video to see you to train it.