This was hilarious!  This footage was actually made for Amber Watch Alert and you can find them here.

However with a little creative editing it also becomes a badass advertisement for Left 4 Dead 3. 

I would pay huge amounts to play this game.  No really they need to make one of the characters in the next version of Left 4 Dead to be a kick butt soccer mom defending her kids.  Maybe give her en eye patch or something.   Aaaaaaarrrrr

Best thing I’ve seen all day.