One overcast day a week ago i was flying my hobbico avistar and decided, "How high can i go." so i went up and up until the plane was nearly a dot in the sky, and then the weirdest thing happened. It completely dissappered. immediatly i reduced power and the plane eventually returned into visiblilty and relized what had happened. i must have gone into the cloud layer! when i went back home from the field i turned on the weather channel and checked the cloud ceiling. 1200ft- man thats high. Anything like this happened to anyone else?