The headland at Santa Cruz includes a narrow inlet in the cliff face. As the waves come in, this inlet can concentrate the wave and result in some spraying up out of the top when the wave runs out of places to go. The wave action varies a lot so often there is nothing to see from above. However, as the waves grow, they can spray out a bit or, if the wave is really big, fire a plume of spray and debris up into the air and onto the top of the cliff. A little patience and some luck is required to get this to work for you but it is fun to see – particularly if people have got a bit too close during the quiet times and are not expecting the big one!