Swing and a Hit
The orks attack!
One swings a buzzsaw down on Brother Gadriel, who, being an assault marine, effortlessly parries the blow with his power sword.
Of course, a non-power weapon being parried by a power weapon doesn't end well for the non-power weapon. The buzzsaw shatters as the two weapons strike each other, much to our ever-distant Ultramarine's delight.
'He won't try that again!'
Well, yeah, not without his weapon.