Why won’t my impact wrench take a lug bolt off the car wheel?

I have an impact wrench and an air compressor but when I try to take lug nuts off the car they won’t budge. Is there a minimum CFM I need for the impact wrench to have enough torque to get the lug nuts [...]

What would happen if you jump in air before crash impact?

If you jump up and down on a train, you land in the same spot. You don’t go through the window right? BUT, say if you were on a subway train and another train was coming head on. What would happen if you watch the [...]