Um

[yukinoomoni]

You come into my store to use my machine, and so I give you instructions to make use easier and smoother. You start to act like you know better than me, so I back off. Then, when the machine jams, LIKE I WARNED WOULD HAPPEN, one would think that you would apoligise rather than get pissed off at ME, right?

Logic. Such a mystifying concept for most of the population...