Gif wrapping
Animations are great to help with visualising physical concepts and I use them a lot in my teaching and web pages. On web pages I like to use gifs, this is because they run on the page without having to use a media player and can be uploaded to the server without having to host them some where else like youtube or screencast. I generally use these when representing some repeating motion like a pendulum. I make a video of one cycle which is set to loop automatically. The only problem is the that they can be rather annoying as they continuously play while you try to concentrate on the text. I've tried various ways of starting and stopping the animations but nothing worked. This Christmas my brother in law, also called Chris, Chris Ramsay, solved the problem with a bit of code. So from now on you will be able to reset the animations. I almost forgot, happy new year.