I noticed that "toe walking" with me today after reading this thread.
It feels natural for me, so I never really paid attention to it before. I doubt I'm doing this when wearing shoes though, it would be useless and hard to begin with I think.
Toe walking is also nicely quiet.
Well, I'm known for scaring others in the house by suddenly "just being there" - I got used to say from afar "don't be scared, I'm coming" to my mother since she can freak out (in a "I got scared"-way, not an angry one) if I don't do so and suddenly cause noise by grabbing a bag of chips or stuff like that.
I also like that I'm walking silently, I don't like noisy walking. When "running" through the house, I'm also doing that on my toes, same for walking on stairs.
I don't flap hands though, don't think I ever did that.
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Diagnosed with Aspergers.
BSP-errors are awesome.