You guys in SA seem to have a fasination with blowing stuff up! Rumour has it that a South Australian was the first person known to blow a tiger up (literally!) & now you want to do it again!

My personal fave is find a good stiff day, point the boat at a pier and jump off before the collision. You don't even have to be going particularly fast - the waves pushing the boat underneith the pylons should take care of most of your issues.

Tiger Mike