you'll be sorry you asked there are several threads here where everyone has added their two bobs worth and is worth a read, just use the search function.
if you lived in WA plenty of good places to get that launch, and than get flung around, i have seen it happen a few times where people say wtf happend than, infact it happent to my dad, he did a loop wihtout meening lands it and planes out of it and every one is stoked, and at all the beaches there are people who can do it almost every time who would give ya a hand, to bad you dont live hear