Final answer:
In the story 'The Theft of Thor's Hammer', when Thor disguised as a bride has the hammer placed in his lap, he grabs it and reveals his true identity.
Step-by-step explanation:
The story 'The Theft of Thor's Hammer' is a part of Norse mythology. Unfortunately, your question seems to be based on information that is not included in the available reference .
Information that was provided, which is about a scene from the 2012 movie 'The Avengers'.
If we refer to the Norse mythology's story, when Thor's hammer is placed in the bride's lap, in actuality Thor's lap, who is disguised as a bride, he proceeds to grab it and reveals his true identity, much to the surprise of the giants.
This is not related to the given reference about Iron Man and his encounter with Thor's hammer.
Learn more about Norse Mythology