I'm very clumsy. I have no self-awareness in how much space I take up, and therefore, I run into a lot of things because I think I can get through; or, the opposite, I'll lag way behind because I don't think I can get through, when really, I can. My balance is entirely skewed as well; I completely flunked the balance test last year, and I'll tip over randomly, even when I'm just standing still.
I don't recall being clumsy in my younger years, but I know I must have been; besides my mother mentioning that she worried about me (I fell down things; I still do, but it's scarier at a younger age) and acquiring the nickname of Grace (because I was so ungraceful), there was a comment on one of my preschool report cards that I had trouble getting down from high areas (ie, the van) and was hesitant with things that I could fall with. (Actually, my report cards from back then are kind of illuminating; I didn't realize some of the things they mentioned until I was looking through them the other week for a recent scoring.)
Funnily enough, I've done things that require some sort of coordination; I did ballet for a year and actually wasn't all that bad (age 4), I vaulted for a couple years (ages 9 and 10, I think), and I enjoy dancing now and supposedly am quite good at it. Yet I fail every test for coordination I've taken, I fall down stairs, I run into walls (and people, sometimes), I trip over just about everything (including myself), and my balance is shot.
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"Nothing worth having is easy."
Three years!