[ukuina]

> When you use a hammer or a drill, do you expect it to sometimes not hit/screw the nail?

Not sure about drills, but this absolutely happens with drivers if you fumble mating the bit to the screw head, or if you miss the stud, or if you overtighten, or if you don't sometimes pre-drill, or if you strip the head, or if you don't correctly gauge underlying material composition, or thickness, or if you...