Oh ...something else I have always laughed at. It appears as if the shield can absorb concussive force.
LOL.
Think of all the times Cap has held the shield up to a major blast, and not even moved! E.g. that scan of his using the shield as an umbrella against a beam coming from directly above (was it from Galactus). That force, even if blocked, should have crushed him to pancake size! The shield would have been his tomb!
Also, another 'side effect' of the shield is how it seems to get BIGGER when used to block. When he is holding it or throwing it it is normal size, but let's say Cyclops let's lose a major blast, or some other major blast is thrown, and sddenly the shield seems to almost double in size (per the drawing).
Maybe Caps jobber aura extends to his shield ...the amazing superlidicious magnanisudicious expandilacious force-absorbicus wonder-shield!