I have had that happen twice and both while hunting.The first was while i was dove hunting in Alabama,looked up to see some dove flying over and pulled the trigger and all i heard was click and click again,forgot to even load the gun
The second was when i was hunting in West Virginia,we were out early in the morning hunting deer and hadn't seen anything till about 10am when all of a sudden 2 big doe came hauling tail by and stopped short of a fence about 75 yards down range from me,needless to say i pulled the trigger thinking bang but again all i heard was click and they were gone.Same thing again,forgot to load the dang gun.
Yea go ahead and laugh all my hunting buddies still laugh at me too.Now i check and double check,no more clicks for me.That and i now carry my 686 for back up