Just watched The Avengers for a second time and thoroughly enjoyed it.
Something I noted during my first viewing and confirmed with the second was about Thor's hammer, Mjölnir. From what I know about it in the comics...and from what was established in the Thor movie...it's a mythical artifact. It's powerful and enchanted such that only those who are worthy can lift it up.
I recall it being used to hold villains and opponents on the ground and immobile just by placing it on their chest.
In the Thor movie and in The Avengers, it's shown to have landed resolutely in a crater of varying sizes, immoveable once released from Thor's grasp.
So is my minor quibble--that Mjölnir bounced and tumbled on the ground in a few of the battle scenes--over zealous fanboy-ness or understandable?