How do you reload your environment while using script/console?

I think I have seen Ryan Bates do it one of his screencasts, but I can't find it.

I believe there is a command you can run while in script/console that lets you reload your models (if say you have made a change) so that you dont have to exit and then recall the console.

Any Ideas?

Just use:

reload!

However, do note that this won't reflect the changes on the models that are already instantiated in your console. To reflect changes in already instantiated models, you may visit this answer.