Here is some more video. The details aren't good, but it shows this tank moving around. Also this sucker is really LOUD, I mounted a 3" speaker facing down with about 1" of "space" between the speaker and the floor of the tank. This really improved the acoustics of the Heng Long sound chip, and gives it a much throatier sound.

[link=http://uk.youtube.com/watch?v=cHypijsDgN4]Sherman in the snow[/link]