Well that's when you know your using it aye, when stone meets kevlar & gel coat. Oddly enough, after scrabbling around amongst the stones for an hour, I found the tiny black fragment & was able to epoxy it back in later. This is life & if you live in the currents & challenge the elements, you will develop the odd scar here & there, the odd abrasion & bruise. One day this new addition to the kayak family will resemble its brethren, each in turn, vying to resemble my own physical appearance in totality. Best viewed with a half squint at distance.