Our oldest (six point six years old as he is find of saying) started Tae Kwon Do last year, and he's digging the whole thing. I thought it was kinda cool how he was learning all those little kicks and combos. With my concrete-like flexibility, I can barely kick at my kneecap-level height (oh and I was sore the next day for even attempting to do so); kids on the other hand can easily reach higher than their own heads. Ok, when their heads are only a few feet off the ground, maybe that isn't a big deal. But still!
At any rate, all this calm changed when our son progressed enuf to start doing some sparring. There's really no possibility of getting injured, as the young'uns are fully decked out in padded helmet, chest protector, arm pads and shin guards. The only possible mode of injury would be if someone stepped on them after they fell over on their backs -- the padding is thick enough that some of the smaller kids can't get back up by themselves and rock back and forth like some beached turtle until an adult helps them up. Regardless, this is when we start seeing the Ugly Parent Living Life Vicariously Through Their Unwitting Children syndrome (UPLLVTTUC for short). Parents shout like they're betting at Golden Gloves; "HIT HIM IN THE GUT! NOW HIS GUARD IS DOWN. YEAAAAAAAAHHHH! WHO'S YO' DADDY PUNK"
I was alarmed as we hope to raise our son to be less cutthroat. So I take him aside, kneel down to eye-level and calmly explain, "Rei, as long as we're having a good time, that's all that counts. Now go kick his ass."