the "toilet bowl" is a popular tourist spot where waves rush in to fill a hole, at which point you jump in, then the waves recede and you are in an empty hole, so you wait for the next wave to fill it back up and "flush" you out, hence "the toilet bowl"
see good video at
https://www.youtube.com/watch?v=eGrfW0nsakw
see good video at
https://www.youtube.com/watch?v=eGrfW0nsakw
