accept you're scared(accepting your emotion's as human) and start focussing on the weakness's of the situation on which to attack. Their attack is your defence. Attack their attack.
If there is a knife...get out..etc...[use your senses....mannnn]
Focus. Focus on the fact that you're scared but that awareness is no escape. A decision must be made!!!!!!!!!!!!!!!!!!!!!!!!!!! Focus on what that decision should be and you'll make the right one.
FULLY INTEND to make that correct decision.
Just Focus w/ Full Intention.

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Use attack as your indestructable spiritual strength.
Awareness is the spirit.
Attack is the foundation of thought.

Attack like thunder from the heaven's.
Retreat like dust of the earth.