We found a great zombie-dog mask and just KNEW we had to automate it and build a ratty dog house to go with it. Both the actuator and the dog house were a fun challenge to build. The dog is motion controlled and has some serious growling sound effects to accompany his leap forward.
The dog actuator and sound modules are all accessable through the back of the dog house. Notice the motion control module, the sound module, and the speakers. We fastened the actuator to the ground with rebar, and weighted the whole rig with cinder blocks to keep it from moving around and working itself loose when it fires.
The frame the actuator is built on is made from aluminum stock.