collide

public void Collide(PhysicalObject that)
        {
            if (new Rectangle(this.bounds.X + (int)this.speed.X,
                              this.bounds.Y,
                              this.bounds.Width + (int)this.speed.X,
                              this.bounds.Height).Intersects(that.bounds))
            {
                this.speed.X = 0;
            }
            else if (new Rectangle(this.bounds.X,
                              this.bounds.Y + (int)this.speed.Y,
                              this.bounds.Width,
                              this.bounds.Height + (int)this.speed.Y).Intersects(that.bounds))
            {
                this.speed.Y = 0;
            }
        }