[__z]

Also Wesley Autrey, the "Subway Hero" who dove onto the tracks of the oncoming 1 train in order to save a stranger who had a seizure and fell onto the tracks. He held the man down in a drainage trench and the subway cars passed over them. That's about as literal as "jumping in front of a bus" as it gets.

Plus all the teachers at Sandy Hook who gave their lives protecting their students.

Those two are just off the top of my head. The willingness to put one's self in danger for others isn't exclusive to parents.