I had a legendary raider in VATS just before, hit him with close range head-shots and he had a railspike up each nostril.
I've laaaaaaaaaaaaaaaaaaaaaaaaaaaughed!
Enjoyed railgun on jet killing institute scientists after being forced to kill railroad leaders.
If they are close to the wall(doesn't work properly when they are crouching) you can pin them to the wall from hands and feet without severing the limb. Dragging the dead body will result in hilarious movements.
That sweet gold lined sentinel armor though.