[Callers] Bubble Sort Contra Dance

[Tepfer, Seth]

I've heard people saying Will or Nils called a bubble sort contra dance. 
Googling found this (semi)circle dance 
(http://www.jefftk.com/contras/dances/labubblesort). Will Mentor said he danced 
one Nils called, but it was a contra. No word back from Nils yet. Any one on 
the list seen a bubble sort contra?