Stewart would have been killed.
I'm sorry, but if i put you in charge of my two babies and you leave them alone and they almost burn to death I'm going to have to kill you. I would have punched him and probably never spoken to him again (or it would at least take me a few years to calm down). The fact that they made him look like a hero in the end for running after the guy or that "Stewart is just a bone-head what else can you expect?" attitude is not realistic.
"Nothing great is ever achieved, without much enduring." - St. Catherine of Sienna