/late like a speedster
[Since there weren't any more teammates at the party to witness Wally dressing up as them (unless he wore a skirt but nobody wanted to see that), which is most of the fun in doing so, and he already played the assistant with a sparkly bow-tie for Zatanna at the fair, he decided to go a completely different route than Artemis tonight and decided to dress up like Indiana Jones.
But maybe they can do the complementary costumes thing the next time they attend one of these together.]
I hope Zatanna isn't too jealous because you look better wearing that than she does. [He might be just a little biased, though.]