Happy Halloween! How do you plan to use your Android device to get a Fright?

I have the luxury of having three wonderfully amazing kids. No sarcasm at all in that statement. Over the last few days I have been thinking to my self, what can I do using my devices and accessories to scare the pants off them. I think I have come up with something that should do the trick quite nicely. I have fully charged up my Braven 600 Bluetooth Speaker and will be placing it right outside the back of the house after it gets dark. I will also be placing another Bluetooth speaker that I have in my daughters room while she out with her friends. I have pre synced them to my phone and have already tested to make sure I can swap back and forth easily. Then, I have installed various Halloween soundboards on my phone. Get where I am going with this yet? Later tonight, after the excitement of trick-or-treating is over, it will be time for dear old dad to play some tricks.  Once it is all nice and quiet in the house I am going to start triggering different sounds from the apps and just watch as all the kids start loosing their minds. Should be a good time.

What tricks do you have up your sleeves fro Halloween that uses an Android device in some fashion? Below are the Halloween sound boards I installed. Do you have other apps that you might recommend?

Application: Halloween Sound board 
Developer: MobileFramework
Cost: FREE

Application: Halloween SoundBoard
Developer: Tricky Banana
Cost: FREE