I found this beetle in the dirt where I had dug up a prickly pear cactus. It acted almost dead. Very stiff; hardly any movement. It had a lot of dirt on it, and wanting to get a better look at it, I put some water on it to wash it off. Before I got much of the dirt off, it "woke up." (I'm thinking there could have been some "possum playing" going on here...) It started walking around, but would act stiff again if disturbed. Would stay in the headstand as shown in the photo for several seconds. I didn't notice any odor. When undisturbed, it ambled off, seemed to be looking in the rocks for something -- maybe dinner.