Good idea on the unpredictable rest, I will have to give that a try as well.
Igloi never told you what was next. But if he said "spikes" you knew it was going to be hard. We trained at Santa Monica College and directly north of the track was a graveyard. One day a newbie, after coach announced "spikes" asked "what are we running coach." That was a no-no. He looked at the newbie and point to the graveyard "you will rest in peace....over there." Nothing but silence!