New guy here been reloading for about 25 years never had this happen....Got in a hurry sizing Dasher brass to shoot tomorrow and crushed/cut the hell out of the end of my finger....got it hung between the case mouth and bottom of the die even the primer pin got some haha......never realized quite the pressures involved when sizing brass, of course I pulled back so hard you'd thought I was trying to pull start a school bus....I like to share when I do something dumb shooting or reloading maybe it'll help someone else down the road....