My mother ended up in the hospital, after having been almost killed by an eye breaking off while connected to a stretchy nylon line connected to a car trying to pull a half sunk boat further up onto shore. The whole situation was riddled with unsafe tactics. Lots of lessons learned. Even more so, because the eye was not connected to a heavy fiberglass boat, but rather a heavy 1939 Century wood boat. Wood screws can only hold so much! I guess the relevance of my comment here is that for me, personally, I would be VERY wary of ever putting any undue "shock" stresses on an eye of any boat -- especially if there were humans anywhere around the other end!