It's just blood, nothing special. Just do it and save the guy's/Gal's life.
If it was a different situation like. The guy or gal is in trouble and if we took the blame for it, he or she wouldn't be suspended but you'd have to have a day in detention or worse.
Perhaps a more crazy situation. You see him start a fight like every day, but this time he bit more than he can chew and is about to get jumped by 5 people. Your the only one around, and possibly the only one that could save his life.
Depending on the severity of the task, issue, problem, or situation. The help you would, should, or could give is different; and the risk/reward would be completely different for each time.
It comes down to the question, "Are you a good person, or a person that is willing to ignore someone."