I have put this together using Bigants Actuator setup. If you want to know how it works, then his cheap and easy monster in a box thread has all the details, what to order etc.
I have simply attached some shiplap fence boards to a panel, just securing them on one side.
I have mounted the actuator system to push against the boards, and this is fired by the remote control.
I will add more boards and stain etc and include this in a larger fence section, which will have zombie arms waving through it. The rattling fence will add to effect that the zombies are breaking through.
If you like this, it would cost less than $20 to make and is very, very simple to do, so have a go. You can order all the parts from amazon, bar the pallet and some fencing.