My friend, who is East Indian, is getting married to her German fiance in his hometown next month. I've been nominated as a wedding witness along with the groom's best friend and we have been told that part of the responsibility is to help plan certain aspects of the wedding so the bride and groom's cultural traditions can be represented. I'd like to plan a fun surprise at the reception but am out of ideas. We did a group dance at her sister's wedding, so I don't want to repeat the same. Any ideas on how to do something memorable?