A guest on TV is telling about his visit to Disneyland.
Presenter: how many times did you go around on the rides?
Guest: we did the um Big Thunder Mountain 11 times.
Presenter: back to back to back?
Guest: and I felt sick every single time I went on it, not back to back to back David Walliams (see: 5:39-5:50)
I know "back to back" meaning consecutively, and looked it up anyway. There are 2 backs, not 3. So why do they both say back to back to back?