After removing that call and checking it in a few times by accident I did something I've never seen anybody else do.
This is absolutely no use to anybody browsing my website in it's deployed form, and I should put a wrapper around that to only use it in developer mode, but what it does is simple and perfect for me.
First it gets jquery from googles servers.
Then it checks to see if jquery is actually loaded. If not it adds a script tag that loads jQuery from a relative URL.
That is all