Wild animals do not always cooperate.
In this video Austin Pate and Keith Bean attempt to release a hog from one of their traps. It only takes about 5 seconds into the video before you realize this is going to go horribly wrong. The good news is that everyone is alright except a few cuts!
Now I am no hog trapper but I’m pretty sure the purpose of a hog trap is not to release them! I could be mistaken though.