Manias can be alarming, meaning surprising. Or manias can be deadly. And deadly means that they can cause people to die. Now i'm going to play er j walker's presentation for you now. Ad on my web page, which is teacher luke dot podomatic dot com,. I will post a copy of the video on the web page and you can watch it there. If you like, if you're listening on your eyepod or something, you can just listen to the presentation now. Think about it, try and understand it.