On a winch site check ride in the north of england, glider ASK-13.
Very windy on the ground and a substantial wind gradient to climb through. Instructor in the back says to not worry about the launch speed being high, but when it goes through 65 knots at a rate of increase about 3 knot/sec, I pull the cable release, about 300 ft. Note that max winch speed on a 13 is 58 knots
Idiot instructor then grabs control and turns back to land instead of putting it down straight ahead. I thought we'd had it then.