I pulled one sort of like that on my folks. I was around four years old, and we were at a car lot. I went running full speed around the building and discovered that the bottom corner of an electrical junction box was at the same AGL as my forehead. BAM! Down! Blood! Stitches!
Scalp wounds bleed a little. [/understatement]
P.S., I'm willing to wager that your wife's screams scared R2F2 more than the blood and pain did.
