TOW PLANE Accident

I've been towing a number of years (3000+ tows). I ask every new glider student what's the number one rule on aerotow. They better answer: "Don't kill your tow pilot." The one time someone (very experienced glider pilot and CFIG) kited on me on tow, the negative g's plastered me against the ceiling of the towplane and I physically could not reach the tow release handle on the floor. If it had occurred a couple of hundred feet above the ground I would not have recovered. The pilot said he was momentarily distracted and looked away from the towplane. It doesn't take but a few seconds and no one is immune...