It's true a good recall is the key to everything...
The situation Karen had could happen to all of us. It's great we're learning from this and have a laugh, too
I recommend this video, because it has many great tips in it, and is full of common sense! One of the MAIN ones in my opinion is that we often lose our dogs again who have a recall, by making them COME and immediately follow this with an obedience command, too soon and some learn that is not fun, so the value for the recall has gone down the drain, if the obedience command isn't a high valued one (yet)... The second most important thing is that if you are unsure whether the dog comes THEN DON'T call at all... rather step on the lunge line so that they don't learn they can ignore you and get away with it.
The more a dog gets to practice a behaviour the harder it will be to un-train it..
Now depending on where you are in your training, I think this is a great idea how to use your lunge line and do some training with and have fun at the same time, yet still feel safe that you're going to get an even greater recall. The lunge line is not used to 'reel the dog in' but just to gently get the attention.
http://www.youtube.com/watch?v=lHk9k4x0h1k
I think Caro actually even knows these people? They train close to her, I think...