I shot at a buck 4 times one day with my bow.Watched him come in from a cornfield about 150 yrds away, he walked past at about 15 yrds and stopped in an opening, I drew, aimed, fired and the arrow went in front of him.He ran about 5 yrds, turned around and came back, he started sniffing my arrow sticking up out of the ground so I knocked another one, put the pin behind his shoulder and shot again, this one took him right behind the head in the spine and dropped him like a rock.I couldnt figure out what the hell was going on and decided to put another one in him.Hit him clear back in front of the hind legs this time.Im kinda freking out at this point, I had only killed 2 other deer with a bow and had no problem doing it.Stuck my last arrow and and started drawing back, I was so rattled it fell off the string and went to the ground.I climbed down, got it, and walked over close as i could get and shot it, this one went where it was supposed to.Found out later my rest had come lose, the broadheads were hitting the riser when i shot and deflecting the arrow all over the place.Bright side to this day I check things out carefully everytime i get in a stand and make sure nothings moving that shouldnt be.