Crawling? Oh the Humanity!

I knew it was bound to happen sooner or later, but I was hoping for later rather than sooner...Oliver is starting to crawl. So far his resume of crawling experience includes only getting up onto his hands and knees, lunging forward at various toys, belly-flopping during said lunge, and flipping himself from side to side. I don't know whether to be proud or to cry. I can't believe he's getting so big!