@Cat Lance, aww, my middle son, who is almost 13, went through an extremely clutzy period when he was about two as well (it continues to this day, in fact, because he is my child). One evening, when his father was out of town (he was a fighter pilot and gone more than half the time back then, especially, it seemed, when trips to the ER happened), I made a super quick trip to the bathroom while my son and my daughter (who is 18 months older than he is) ran around. I no sooner sat down than I heard a loud BOOM. I wasn't that concerned at first, because the child ran into everything, but when I hurried out, there he sat, absolutely covered in blood. Like, Origins levels of post-fight splatter. He'd run headfirst into the corner of the wall at juuuust the right angle to open up his forehead. That was the evening (of course it was an evening, because why would it be during regular office hours for the doctor?) I learned exactly how much a relatively small head wound can bleed. He required a number of stitches and still has the scar, though I don't think anyone even notices it anymore except me! And that's only because I love it, because it's part of him. And anyway, we sort of match. I still carry a small horizontal scar smack in the middle of my forehead from jumping on my Gramma's bed when I was three. I may or may not have been warned repeatedly that I was going to crack my head on her nightstand if I didn't stop.
Hugs to your little guy. He sounds like a sweetie! I hope Solas's head scar returns for him, especially, because head scars are awesome and I am obviously not biased about this at all.

EDIT: Wow, this took me long enough to write that I didn't know How to Train Your Dragon had been brought up. SOLAS THREAD MIND-MELD.