Hammer Bag Screw Driver (kéo búa bao) is the Vietnamese version to the game Rock Paper Scissors. They might call the game "One Two Three" & some may say Needle instead of Screw Driver.
I'm an American living in Saigon. My English student told me this today. But I don't know why Vietnamese say "HAMMER" instead of rock in their Vietnamese language.
They will translate the word, HAMMER ("búa"), back into the same English word "ROCK" (Đá) but won't use the Vietnamese word for rock (Đá) & instead use búa (hammer), not Đá (rock). I know rock smashes the scissors but can a hammer smash a screw driver? Maybe.
Can a screw driver or needle kill a bag? The last one I understand. You can put the hammer in the bag or backpack. The bag eats the hammer.