Stormtrooper armor
Have you ever seen it get pierced or even dented?
The novel "Lightsabres", from the Young Jedi Knights series, contains a sequence of events which helps demonstrate the mechanical strength of stormtrooper armour:
"Qorl stood inside the training chamber holding a wicked-looking spear in his black-wrapped left hand. His droid replacement gripped the gleaming shaft with enough force to dent the metal."
...
"He cocked his droid arm back - and hurled the deadly weapon ..."
"Norys slammed into the wall, his helmet ringing against the hard metal bulkhead. His vision sparkled with impending unconsciousness."
...
"He looked down at his chest in amazement and saw only a nick in the white armor where the spear had struck."
Amazing right? Then how, in all the movies, did the stormtroopers die if the bolts never penetrated the armor?