What are the rules, implied or explicit, of the walk? Rules here as a compound set, the rules of the site (don’t cut across traffic, stay to the right, don’t walk on the flower beds, don’t climb the fences) plus the rules of the walk (I’m going to speak to you gently, direct your attention, make an offering).
Are you interested in pulling the rug from under the walker by abandoning or contradicting a rule? Is there an element of I-dare-you to your (the maker’s) relationship to the walker? How much can you ask of the walker? How much does their non-passive participation complete the walk, beyond the basic agreement to walk and to listen?