S4bill- a shock gobble is a male turkey gobbling in response to a noise, natural or otherwise. I have had turkeys gobble their heads to the sound of my truck door closing. Turkey hunters use locator calls like owl calls or crow calls, or even coyote howlers to make a Tom gobble and give away his position. If you use an owl hooter just at sundown a Tom may gobble and give away his position so you know where to set up the next morning. Owl hooters are good just before first light too, or they are to most hunters anyway. I have had better success after first light using a crow call. Locators don' t always work, and it doesn' t necessarily mean there are no turkeys around. I have called in several toms that did not respond to locators, but gobbled and came in when I set up and started calling on my slate.