Ah, my mistake about the planking, in that case. For some reason, I thought he had the same amount of invincibility frames as everyone else >___>;
As far as Brinstar/RC, I think it's more of a psychological/subconscious thing thing, crazy as it sounds.
Because, we see MK screwing around everyone he fights on those stages.
And then... we just get worried about the stages because of all of the things that COULD be done there, despite the fact only MK can do it(Others can too, but not to the extent of MK, no way).
And as a result, we think the stages are just janky and shouldn't be legal, citing that sharking and extreme stalling are possible on the stages as ban criteria, but only because we see MK do it so many times and no one can seem to beat it.
Sure, we also cite the uneven terrain/acid/movement/temporary walls and walkoffs, but there's nothing really too awful about that stuff, but we include it anyway as a part of the MK-inflicted subconscious prejudice of the two stages.
I know it sounds silly, but hey, it's an interesting way to look at things, I think.
Oh, and by we, I don't mean us, I mean the less educated people who don't really cruise these boards on SWF, and think Brisntar/RC should be banned.