Back when I first went sly, I was using Schick Xtreme3s. On maybe my second shave, I ended up with a dime-sized nick on my right side. Not bad, but obvious. Healed pretty quickly, and the HeadBlade Sport didn't bother it at all.
Today I was using the HB with a Gillete Sensor on the 3d shave with that blade, and I felt it cut that same spot. Went to rinse the blade, and saw it was really jammed up. Tapped it a few times, and finally took my fingernail to it. It was skin!