Where Was Loki while The Avengers were Eating Shawarma?

Did you eve wonder where Loki was while The Avengers were eating shawarma after the credits rolled for the movie? Thor was there, so he hadn't taken Loki back to Asgard yet.

Artist Anna Rettberg created a couple of fun pieces of Avengers art, one picture shows The Avengers chowing down on some Shawarma, the other piece shows Loki tied to a lamp post outside of the restaurant. It makes complete sense, I love it!