A 2008 F250 did that to me about 3 months ago - same truck that boogered up my eye that I posted about at the time - while cleaning mud from underneath the wheel wells. You might know it was a Ford. :smt093
An almost identical cut in the very same place that looked just as ugly but it wasn't as deep so no stitches. It took a loooong time to heal and a little scar remains but no big deal. Ain't the first scar I ever had.