Evangelicals: Why does it look like you are doing the funky chicken when you speak in tongues? ?

I'm not an Evangelical, but wouldn't be surprised if people found this question highly insulting. There are many types of Evangelicals who don't speak in tongues. For those who do, they regard it as an outpouring of the Holy Spirit, and take it very seriously. What they are doing may seem strange to onlookers, but they are worshiping God. The last time I checked, people are free to worship as they see fit. I have friends who speak in tongues, and personally would never hurt them by mocking their beliefs.