If you realize that your Papa Pear is about to light up the last bucket, but you haven't hit the goal score yet, shoot out as many Papa Pears as you have left. They will most likely earn you more points then if you simply wait to get the bonuses for having extra Papa Pears at the end of the round. The level will not end until all of your loose Papa Pears have gotten into a bucket, even if you have lit up every bucket.