The folks behind Rooster Teeth's brilliant web series Immersion are back again, and this time they're looking at whether or not the Left 4 Dead scenario of average people taking up weapons against the undead is realistic.

This test by Immersion is decidedly unscientific, but more importantly it's hilarious and pretty awesome. Oh, and it features some hella impressive watermelon carvings like the one above. Watch! Enjoy!