On 6/10/06, Nuno Maltez <nunomaltez at gmail.com> wrote: > dWorldStep(); //b1 slows downs and eventually inverts its movement, > BUT b2 stands still as if unaffected by Gravity > > However, dBodyGetGravityMode() returns 1 for both b1 and b2. Just a guess, but perhaps b2 is autodisabling? If so, you would have to wake it up manually. Jason