Forget whatever box-office thriller you were hoping to rent this weekend. Here's some real-life footage to make your heart race.

It's a video of a mama rat saving her offspring from a predatory snake. And after you watch it, well, you may never look at that vermin of the subway the same way again.

In a clip posted to Facebook by Rojas Montecinos Evy on June 26 — and on YouTube late last week — the snake appears to hold the baby rat in his mouth while the mother frantically trails along behind him, trying to trip him up. Though the baby's fate seems pretty much sealed, somehow — somehow —the snake is startled enough by the persistent mama that he seems to decide against eating the baby and drops him.