         // FIXME (rfrishbe): this should be parameterized better and the heuristic should 
         // be documented better
         if ( (lastDt >= 3*averageDt) &&
-            (lastVelocity.length <= MIN_START_VELOCITY))
+            (lastVelocity.length <= minVelocityPixels))
         {
             isScrolling = false;
             

            i++;
        }
        
        return new Point(weightedSumX/totalWeight, weightedSumY/totalWeight);
    }
    
    /**

    
    /**
     *  @private
     *  Minimum velocity needed to start a throw gesture, in inches per second.
     */
    private static const MIN_START_VELOCITY_IPS:Number = 0.8;
    
    /**
     *  @private
     *  Maximum velocity of throw effect, in inches per second.
     */
    private static const MAX_THROW_VELOCITY_IPS:Number = 10.0;
    

    /**
     *  @private
     *  Weights to use when calculating velocity, giving the last velocity more of a weight 
