If you see your opponent is hurt/stunned many fighters will try and go for the finish by overwhelming them. When an opponent is hurt they will usually fall back against the ropes or cage and try and cover up to protect themselves while they recover. problem is when you do that you are always leaving something open. The concern for the attacker is 'punching yourself out' if you aren't able to finish your opponent and he recovers you may be too tired to effectively deliver attacks moving forward. This happened on the under card of the Pacquiao/Margarito fight when Mike Jones fought Jesus Soto-Karass. you can read about it here http://boxing.fanhouse.com/201…..rd-and-ma/ 

As a person who is getting overwhelmed the most important things are vision and movement. never drop your head, or cover up where you can't see your opponent. the second is don't forget your footwork. you want to be able to circle out, or cut angles to get away from your opponent to give yourself time to recover. If you retreat straight back then you will always end up against the ropes, or cage and it cuts off your ability to escape. 

Some fighters will also try and clinch/grapple in an effort to slow things down and rest/recover. that strategy has it's own strengths and weaknesses.

hopefully some of these other guys with much more knowledge and experience will chime in and give you their thoughts as well.