I hope people are taught that go-arounds are possible, even after the third bounce, but I'd rather not see them trained in bouncing three times and then going around.
I was going to comment that gertie didn't suggest that the exercise was demonstrated, and that you're reading a more specific meaning into "trained" than was intended. Mind you, having a good idea of who trained Gertie, I wouldn't actually put it past them when bored...
