Forgot to chamber a round while sitting in a deer stand, in 20 degree weather, and shivering all day. Thank god I didn't see anything but felt like an idiot for suffering that long and it wouldn't have mattered.
Recently I've been walking behind my house with a heavy pack to get ready for hunting season. Decided it would be a good idea to carry a rifle since that is what I'll be carrying during season and we've been getting a few pigs around the house. As luck would have it, I saw pigs on our place for the first time. As luck would not have it, I was face to face with a pig at 20yds in a thicket when I heard.....CLICK.... He didn't stick around to watch me chamber a round or listen to me cuss.