To what extent is the circulating information true that the wisdom behind saying "Alhamdulillah" after sneezing is due to the heart and all body organs stopping during a sneeze, and the resulting dangers such as a fractured rib or death when trying to stop it, or the eyes popping out of their sockets, and that praising Allah is a form of gratitude for this salvation?

It is sunnah to praise Allah after sneezing by saying "Alhamdulillah" (All praise is due to Allah), based on the Prophet's (peace and blessings be upon him) saying: "If one of you sneezes, let him say, 'Alhamdulillah'." This remembrance is legislated regardless of knowing its wisdom. What is said about the heart stopping or some body organs ceasing to function during sneezing is incorrect.