Directional Collision Detection

                //NOTE: THE BELOW WILL ONLY WORK in POSITIVE Y quadrants
                foreach (Entities.Mobile mobile in Game1.registry.Mobiles)
                {
                    if (mobile.bounds.Contains((int)Position.X, (int)Position.Y))
                    {
                        if (LastPos.X > mobile.bounds.Right)
                        {
                            if (mobile.bounds.Top < LastPos.Y && LastPos.Y < mobile.bounds.Bottom)
                            {
                                BounceVert(mobile.bounds.Right);
                            }
                            else
                            {
                                Vector2 crosspoint = new Vector2();
                                crosspoint.X = mobile.bounds.Right;
                                crosspoint.Y = (Position.X / crosspoint.X) * Position.Y;

                                if (crosspoint.Y > mobile.bounds.Top)
                                {
                                    if (crosspoint.Y < mobile.bounds.Bottom)
                                        BounceVert(mobile.bounds.Right);
                                    else
                                        BounceHorz(mobile.bounds.Bottom);
                                }
                                else
                                    BounceHorz(mobile.bounds.Top);
                            }
                        }
                        else if (LastPos.X < mobile.Position.X)
                        {
                            if (mobile.bounds.Top < LastPos.Y && LastPos.Y < mobile.bounds.Bottom)
                            {
                                BounceVert(mobile.bounds.Left);
                            }
                            else
                            {
                                Vector2 crosspoint = new Vector2();
                                crosspoint.X = mobile.bounds.Left;
                                crosspoint.Y = (crosspoint.X / Position.X) * Position.Y;

                                if (crosspoint.Y > mobile.bounds.Top)
                                {
                                    if (crosspoint.Y < mobile.bounds.Bottom)
                                        BounceVert(mobile.bounds.Left);
                                    else
                                        BounceHorz(mobile.bounds.Bottom);
                                }
                                else
                                    BounceHorz(mobile.bounds.Top);
                            }
                        }
                        else
                        {
                            if (LastPos.Y < mobile.bounds.Top)
                            {
                                BounceHorz(mobile.bounds.Top);
                            }
                            else
                            {
                                BounceHorz(mobile.bounds.Bottom);
                            }
                        }
                    }
                }