Proofing the Recall (re: Culture Clash)

[cJw314]

Greets!

So I've finished Culture Clash, and was curious about the application of the "college level recall" section in the book, which basically talks about proofing recall by interrupting a retrieve with the "Come!" cue.

This felt rather... counterproductive to me, although I couldn't quite place why. So, I'm turning to the "pros" (flattery will get me... anywhere?) to see if it's something you've tried yourselves.

If not, do you think it's a good practice? Obviously, what works for you, the animal, and your end goal is what you'll theoretically use, but...