I am a scuba diver and have considered using weights to help with photography. That got me to thinking about the kinds of hazards that may befall a stream or river snorkeler with the added dynamic of current and obstacles.
For example, scuba weight belts are designed so that they can be dropped in an emergency but I imagine that this can be a problem in shallow streams where you might not be able to reach the clip.
I was wanting to hear about people's close calls or real emergencies. What happened and what got your butt in a bind?
Have you ever had trouble pulling the safety clip to drop the weight?
Are there problems with getting wedged by current into downstream hazards like rock crevasses or treefall?
What about current entrapment? There's a low water damn near me that claims one or two kayakers who ignore the warnings every few years because they get sucked into an underwater eddy and can't get out. Even with flotation!