Yeah, for future reference linking to images there is blocked.
This thread made a nice companion thread to Jill's green giant thread. If we had the capability we could merge them . . .
I usually avoid tires with recessed grooves like that because they can help 'grab' road debris and give it a chance to dig in with a few revolutions-- the business end of the nail did go right into the recessed groove, although I can't imagine how it got any purchase. Freaky.