[reisser]

As another differing opinion, I'd say eyeball it as best you can. Film some bins falling with a video camera and keep it handy while you animate. Last year I "eyeballed it" animating some soccer balls going into a goal and got very good feedback about it on this forum. Play with it. If worse comes to worse, conveniently "forget" your original plan to knock over all the bins and cut the camera at a point when everything still looks real. Reactor sounds like another good suggestion. I;ve never used it so I can't help there.