Video: What happens when you're about to die?

As Halloween approaches, you may be watching more horror flicks. And afterwards, you might be imagining ghouls and axe murderers around every corner. The fear you feel as you watch a victim die, the screams you make when the killer jumps out on screen—these responses are surprisingly similar to those of the poor victim in the movie.

What happens in your brain when you're about to die?

This week, Reactions walks you through the chemistry of your last moments.

Check it out here: