Twanging a table knife on a desk, recorded with minidisc and condenser mic indoors, approx 6" distance. Background noise removed with audacity. Short metallic vibrating noises.
I have never sabotaged someone's car tyres. I was curious and wondered how it may be feeling to puncture a tyre, so i ran a bowie knife in a old wheel i had. It wasn't so easy as i thought, had to use rather strong hand.