Hi all ,
I once stood over a blow hole when i was abroad , a big wave come in ……!!!!!!! . I can tell you sand and sea water reached places sand and sea water should never go , and yes it did some weird stuff . Kids please dont try this at home lol it aint nice !!! .

Regards
Mungo
ps to see why http://www.youtube.com/watch?v=v04CfSmCjRg