For the `<script>` tag, I simply [copied that line from the HTML5 Boilerplate project](https://github.com/h5bp/html5-boilerplate/blob/master/index.html#L25); it's less code than using JS to create a script element, attach the src attribute, and attach it to the DOM. I also think it's more readable this way.

`jQuery` would already be in the `window` if the Django project using Django Debug Toolbar was already loading jQuery -- something that I think is highly likely.