Kinda weird problem...

Hello,

I'm doing something like this : http://pastebin.com/m757c442e
And it goes like this : http://www.youtube.com/watch?v=oIj-9-hlKGs

Does anyone have an idea ?

Thanks.

Show the code you are using to create the box, perhaps not setting the inertia correctly? Also, I cant see debug lines of the cube, perhaps it's alot smaller then the visual shape?