My wife encountered a scary incident a while back which created an uncontrolled ascent. It was due to her weight falling out of her weight pocket. She told me after the dive that she believes that she inadvertently must have unsecured her velcro on her weight pocket when she was putting something in her side pocket. She tried to grab me but the force pulling her upwards did not let her and she started ascending, luckily she remembered to exhale out instead of holding her breath ( avoiding pulmonary barotrauma). It was a very scary incident and we made some changes to avoid this that I want to share with you all. I do believe whether it is a buckle that fails or whether it is an undone/ or worn out velcro that the potential of this happening to anyone is great. It is worth mentioning and thinking about what can be done to help prevent this from occuring. One thing I do want to point out is that we very lucky in that the we were at the end of our dive and at a shallow depth at 15. DCS was not a concern but lung expansion can occur if proper technique is not practiced even at shallow depth.
I want to share some of the changes we made and perhaps you can chime in and add some of your own thoughts on this matter:
First we thoroughly check out the velcro and made sure that they were not worn out and they still kept the weight pocket fully secured.
We also put more weights toward the back of the bc in the trim pockets, to help distribute some of the weight.
I have also have practiced with her the dumping of air and finning down hard to avoid the quick ascent.
I know that there are probably a few more things that could be done to help avoid this and I hope some can share there knowledge with us and others to help prevent incidents as best as possible such as this.