11:16:16 AM Mar 3rd 2012
I'd like to remark that I don't find this trope to be particularly unjustified, but not for the listed reasons. Suppose you were a giant and someone was unloading a machine gun on your skin. What would it feel like to your comparatively large body? I imagine it would be little different to being stung by insects. ...And I probably just invalidated my own point.
11:16:51 AM Mar 3rd 2012
Crap, I meant to post that on Giant Equals Invincible. Never mind.