im not sure if anyone else has noticed but you can jump over the boulders that fall from the sky (just hump them and jump). And same thing w/ erics mine cart, you can hump it and jump and get in. Right now all our collision detection is model based, the player is actually just a single point in space, and when he moves, he collides against the actual faces of the polygons that are marked as collidable. We'll probably have to do something like specify a collision shape independant from the model, like say "yes this mine cart is collidable, but just do collision against a bounding box, instead of against the geometry itself". Or for the rocks, a cylinder might make more sense. shrug... anyhow, just FYI it's on the radar if anyone did notice!