I was 13 and elk hunting in Northern Arizona. I shot a nice 5x5 from around 230 yards. When my cousin and I made it to the spot where I thought he was hit I turned to see him staring me down from no more than 10 yards, bleeding and unhappy. I raised my Remington 7400 30-06 and pulled the trigger and heard the loudest, most horrific sound a gun can make.....click! As it turned out, the action hadn't cycled completely forward after I shot the first time.
I re-cycled it and ended up taking the bull, but for every hunt after that it's been nothing but bolt action for me!