File Under "Growing Up"

Today my son, who is all of 16, started his first job.
Pushing carts.
He almost got run over by an old lady and a customer pushed a cart at him and hit his knee, got sunburned, but all in all I think it was a good day.
Quite a step for him.
He has always had issues (debilitating at times) with new experiences, so even the fact that he was able to go though the interview process with people he did not know in an unknown environment is a huge, HUGE step for him.
I'm so proud and sad at the same time.
Like they say they do grow up way too fast.