The opening scene with the street merchant was completely unscripted. Robin Williams was brought into the sound stage and was asked to stand behind a table that had several objects on it and a bed sheet covering them all. The animators asked him to lift the sheet, and without looking take an object from the table and describe it in character. Much of the material in that recording session was not appropriate for a Disney film.
"Combination hookah and coffee maker, also makes julienne fries! It will not break! It will not- …. it broke."
that line used to just kill me as a kid and now it’s better because it was unscripted and he probably broke the prop
“Loki was brought up with the expectation of entitlement — he was born to rule, both Thor and Loki were born to be kings. And yet, there is no kingdom for Loki, so he has to find one. So he’s come down to earth to subjugate humanity and rule the human race as their king. I guess we’ve skirted over the facts of where Loki disappeared to, but we’ve imagined that he’s had a pretty horrible time and this is his kind of last chance at giving himself an identity or a home, somewhere to belong to.” — Tom Hiddleston
To get around the problem of upping the ante without losing the rationale behind the character, Mitchell and Trask hit upon the idea of having Hedwig scavenge the stage of a show that had recently closed. […] Finally they hit upon the absurd concept of a stage production of the sobering 2008 Oscar-winning movie The Hurt Locker. “But this was not just a one-off gag,” Mitchell said. “We love to work from all the angles. Hedwig’s armor is her dress, and Michael starts peeling away at the Hurt Locker set and at Hedwig’s armor until nothing is left but the stage and her body.” (x)