@EzWeeb : Of course they don't. Normal people are idiots beyond reason. Walking, noise-making cancer. Overinflated egos mired in collectivism without the personal responsibility nor the wits to justify any of it.
Normal people are the filth I have to wade through if I want to get anything done whatsoever.
Of course they don't think like that or they wouldn't be like that in the first place.
To claim they think at all would be gross exaggeration.
@sirflimflam : Two things here...
At this stage in the manga (which I later dropped for being complete horseshite), I wasn't convinced she had actually done anything of the sort. This is EXACTLY the sort of manga that engages in deceptive psychological shenanigans, and figured that he'd probably imagined it because he couldn't see clearly what was going on. At least there was sufficient cause for him to be uncertain about what he saw... which would lead one to naturally err on the side of "denial with suspicion".
Regardless, enough time has passed that if anything, fear would usually be motivating him to behave in a less conspicuous manner since he isn't sure what could come of drawing too much attention to himself.
Instead... he is just gawping like a complete retard... ages after the fact. 99% certain he IS brain-damaged here.
As to the other part... if my mother pushed someone off a cliff and I was the only witness... I'd probably just nod appraisingly and say "Nice." ... maybe a bit envious that she got to kill someone before I did ... But then I'm an extreme misanthrope and want most of humanity dead (my mother isn't, but that isn't really the point).
I mean... I don't even know you, but if you were standing on the edge of a cliff with nobody around, you can bet I'd kick you off and laugh as you fell... just because you were there.
@SotiCoto people have different responses, making up the following generally (and shaped heavily by traumas, upbringing, and so on)- fight, flight, fawn, and freeze. Not everyone is going to behave like you (common mind fallacy) and even you might- probably will- come to a point where there are no good options, no ones acceptable to you, or so on- and will probably freeze.
Clearly your response is to fight, mine is as well largely- that and flight- but that's not always the wisest thing. Freezing- facing a dilemma where I knew I couldn't afford to act- probably has saved me from being a murder, worse yet a murderer with witnesses- in one occasion. Freezing has saved me from getting completely fucked over (for example- think what would happen if your reaction were to fight- in the damn army) as well. And so on.
And I've learnt and continue to learn. There's things- many in fact- I wish I hadn't done in the "fight/confrontation" response- and I've learned to manage my reaction and let my head cool. Even fawning has its place- whether it be as the grease that relationships- romantic, platonic, business and whatnot- run on- or to divert attention. And if your head cools, or you just plain know either way you hate the person and they deserve every bit that's coming to them? If you "must" (or want to, for self-satisfaction) act all the better to do so when they think you're the last one to do it- all the better to do so without them perhaps ever even knowing it was you.
Making people your enemy is dangerous, and making them feel cornered by you more so- whether that be physical, material, social- as Sun Tzu wrote- "build a golden bridge for your enemies to retreat on." Logically it also makes more sense to either have people's self-interest align with your own or seem that way, also.