Poor English.

I went to my friend's house for the Halloween party yesterday.
Everyone wore various costume. It was very interesting.
I wore the costume of the character of the movie. And other people wore clothes of witch and whole body tights.
I hesitated very much what I wear.
Because I could not understand how to do in a Halloween party.
Therefore, I thought what is my favorite and what others are pleased with.
Then I bought the costume of the character of a favorite American movie, and remembered the dialog a little. It is Austin Powers. The remembered dialog is "Groovy" and "Behave it.".