That is amazing to learn in 4 weeks. Do you think Glossolalia is real or fake?
Even Dan Barker, the guy from the Freedom From Religion Foundation, used to speak in tongues. He even says that he can still do it and it is something he enjoys.
It's very similar to when a child will act goofy when playing. My kid does it sometimes. He just goes nuts and starts making all kind of weird noises. Of course he doesn't then claim it was jesus...