Usually there is scattered and unsynchronized clapping after spins during the walk through. This time there was no clapping. I took this to mean people didn't take it to be a petronella turn, and instead were thinking of it differently somehow.

During the first few times through the dance, there was no clapping at all. Then, perhaps four times through, there started to be some clapping. The clapping built over the next few times, to a point about half of what you usually get on petronellas. Then it seemed to diminish some as more people started swinging their neighbor instead of doing the balance and turn (the dance had no neighbor swing).

Anyways, it was very interesting to be watching.