I was in Lions Arch international district earlier today, and ending up being dragged into a Frog worshipping session.

The first screenshot is in front of the tree near storage, the others are of the frog near the fountain opposite the Guild registrar in Lions Arch.

The three near the fountain were all taken within a couple of seconds each other. They show the frog opening it's mouth and moving its head.

Edit:

The second of the three won't upload.