Jeremy and I challenged one time. Scott threw 2 shoes in a row. I said, "what the freak are you doing??" "We always alternate."
Of course SE and Spotts kicked ass. And they didn't alternate pitching shoes.
So now after all of these years I stand corrected. Here are the rules from the NHSF.
Section C. Delivery of Shoes
1. The contestant pitching first shall deliver both shoes (one at a time) and then the other contestant shall deliver both shoes (one at a time). A contestant may deliver the shoes from either the left or right platform but, in any one inning, both shoes must be delivered from the same platform. A contestant shall pitch the entire tournament with the same hand or arm, except in the case of a medical emergency.
2. A contestant shall deliver both shoes within 30 seconds. The time shall start when the contestant steps onto the platform with the intention of pitching. (As opposed to retrieving shoes or removing foreign material from the platform).
NOTE: Extra time taken to repair a damaged shoe by filing a burr, etc., or a delay resulting from a distraction not caused by the contestants, shall not be penalized.
Section D. Position of Contestants During Delivery