So from the pictures I take it you shot low, missed the button head, impaled a stick on the ground, the other end of the stick was levered upwards where it's razor sharp broken end skewered the unsuspecting deer from below, which caused it to loose all it's blood but because the stick was broken off in his chest cavity he didn't bleed a drop. Oh, yes, and the fleching end of the arrow must have snapped off on impact with the dead branch, flipped up and snagged in his hair. Is that right?
The way your heart was racing after the shot you probably would have believed that.
Congratulations on a well placed shot!
Christopher