I’ve heard that yelled a total of 5 times in my life, twice to myself, by myself. In 2009 I found 4 gila monsters, and all were hard to photograph. These guys are protected, and you can’t bother them in any way. You pretty much have to get your ass out of the car and snap away what you can before it disappears to wherever it’s going, so obviously this can be a little tough. Luckily, at least they’re slug-slow. I managed to get a couple before he took off for good over an embankment.