Nothing will result if a tight fist is made while walking. The only thing that will happen is that your hand might hurt if you clench it for too long.
In my style, Shorin-Ryu , and many others I"d imagine, the open palm covering the fists basically represents peace. The opened hand is "peaceful" compared to the closed, tight fist that is ready to fight.
Roll the tips of you fingers into your palm and squeeze tight. This is a fist.
The hand with the fingers doubled into the palm; the closed hand, especially as clinched tightly for the purpose of striking a blow., The talons of a bird of prey., the index mark [/], used to direct special attention to the passage which follows., To strike with the fist., To gripe with the fist.
Below a fist of a hand are the fingers, palm, and wrist.
Making a tight fist will create tension in the hands, arms, and shoulders. Think about holding a table tennis ball without crushing it.
reaching out his open hand and closing it into a fist
To sign "shut" in American Sign Language, make a closed fist with your dominant hand and bring it down in front of your mouth while closing your fingers into your palm. This gesture represents closing something tight or shutting it.
Making money hand over fist is an idiom that dates back to early sailors. They would pull in their catches using a "hand over fist" method to reel the traps or lines in from the ocean. This meant that money (in the form of fish or crabs) was coming to the boat hand over fist.
put your hand, with the top of your hand under your chin, with a closed fist...then open the fist, then close the fist...slowly like a frog is croaking
reaching out his open hand and closing it into a fist
Let's fight, What's right, Too tight, Fist fight,