Opening a small zipper slowly
Air wrench, pneumatic, loosen
Air wrench, long, pneumatic, loosen
Beechcraft King Air 200, airplane interior, emergency door velcro undo
Undoing blood pressure cuff velcro
Undoing a toddler's velcro shoe
Rustling movement of kevlar or bulletproof vest being removed, velcro fasteners being ripped open.
A plastic cereal bag being opened, crackling and rustling movement.
Buttons being done up or put together on a shirt.
Small metal zipper opened quickly.