Cracked Trees
This can be a sign for a multitude of things, but the most common is that a tree is either so damaged or internally rotten that it’s in danger of falling at any moment. This could also mean that this tree was recently struck by lightning, which more often than not splits a tree down the middle. In some unique cases, trees that hold a lot of sap, like the maple tree, can explode because the lighting causes the sap inside the tree to instantly vaporize and expand. If you get caught in this kind of situation, run for cover if you can.