La, they pass  to the right of a Tibetan stupa. As per religious custom (then and  now), they should always walk to the left of the Stupa, and never to  the right. It could be argued that they did so out of ignorance, but  Sandra is chasing after Bob and commits the same error. Surely she  has been in Tibet long enough to know of this ancient custom and  would never make such a careless spiritual mistake.