While I don't have the specific pictures, I am aware of a number of hazards. Cougars are opportunistic hunters, and if one happens by while you are "stuck" in a bog, with an extended extraction time, then you could be an easy meal!

Then, there are grizzly bears, which are extremely huge and aggressive!

Other things to watch out for are hidden logs/sticks, especially in the grass of meadows, or hidden beneath the surface of a bog you are jumping into! On the shoreline of Lake Winnipeg, I punctured one of my feet, between two toes, on a dead willow stick that had been sticking out of the sand, sharpened by a beaver!

In some cases, there can also be sharp rocks. I cut the bottom of the odd toe on some sharp rocks on the bottom of some nice smooth mud, which took a while to heal. Then, there is the trash that people throw out, such as broken glass, or sharp metal such as cans or barbed wire!

If you happen to be sinking in a slide area, where the ground (and everything on/in it) has moved and could very well move again, you have to make absolutely certain things are stable enough, and that you don't destabilize things from your own actions, since you don't want to become buried, or have a rock, tree or log crush/pin/injure you, or worse!
Then, there are the alkali sloughs/ponds/lakes, where the alkali kills most plants (although some, like saltwort, thrive in such conditions), preventing the best mud from being covered over and compressed by vegetation. While that mud was among the best and most extensive I ever sank into/crossed, the white stuff on top can actually slowly, painlessly, eat your flesh without you even knowing it!

Brief exposure may not yield any problems, but prolonged contact, especially if there are any breaks in the skin, will result in sores surrounded by blisters, that spread out and deepen!

Even unbroken skin will eventually get penetrated through the pores, or patches of skin will be affected were any flakes of alkali were stuck to it!

After the areas are cleaned, ending the exposure, then over a period of a week, the flesh underneath the sores/blisters goes from pink to red to brown to black, and then you spend 5 weeks of healing worrying about whether the entire depth of the skin was killed, or if it will heal normally. In the end, if the entire depth of the skin wasn't killed, you will still get some depressions in the skin there, and the new skin, which may or may not have some scarring, will lack pigmentation, and show up white, especially when you have a tan.

One more thing. I would hate to think what may happen if any of that alkali gets into your eyes!
