Tara & Heath Encounter Sand Walkers ("The Walking Dead")

Tara and Heath stop their RV when they reach a barricaded bridge community which looks deserted. A large pile of sand built up on the bridge revealed that whoever was there at one point was trying to cover something up with all that sand. Tara pulls a bag out from the pile and releases a ton of sand walkers who promptly try to attack Tara and Heath. They both get separated and Tara is forced over the bridge into the river.