Computer game engines have had physics e.g. gravity, put into them for decades. But this is really really good. The little people walk up to the spinning bar and then they make a run for it. If they reach the bar, bang! Good old Newtonian physics but, if they trip over a body laying on the ground...hilarity ensues. Dave Fothergill has a very funny falling and struggling algorithm. If you like computer animation you'll love this.