It's difficult to answer hypothetical questions, however the underlying theme of your post seems to be the most relevant. I'm not sure if you personally have questioned whether or not you would be bitter, angry and/or curse God if your family were all to tragically die or you yourself were to lose your legs in an accident, but I think that is the question that should be meditated upon more so than the latter questions posed.
How would any of us potential "electoral" candidates respond to such tragedies? Our responses are evidence as to how far out of Babylon we have truly come. I know that is easier said than done and this is why the chosen are so few.
If we have "come out of her", then we would not become bitter, angry or curse God, knowing that this life is but a vapor and, in the end, God will be All in all. That being said (hypothetically speaking), one could initially become angry and curse God and still repent (if God were to move he or she to do so). If one repents, then the trial one goes through reveals its purpose.
In the book of Revelation, those that curse God refuse to repent. If any of us are unsure as to how we'd respond to potential tragedy in our lives or the lives of our loved ones, then there are still idols of the heart that needs to be cast down.
Matthew 12:46-50
While he yet talked to the people, behold, his mother and his brethren stood without, desiring to speak with him.
Then one said unto him, Behold, thy mother and thy brethren stand without, desiring to speak with thee.
But he answered and said unto him that told him, Who is my mother? and who are my brethren?
And he stretched forth his hand toward his disciples, and said, Behold my mother and my brethren!
For whosoever shall do the will of my Father which is in heaven, the same is my brother, and sister, and mother.