twice i have had them open in flight as soon as i release while practicing. the flight i have got with those two are loud buzzing and random flight, one was about 8 inches to right and up. you did the right thing. after them opening up on me in practice i would check them every ten minutes to see if they were still closed. a big hassle. they never opened when i shot at an animal but im switching to fixed blade just for the reliability and not having to worry.