questions about " coaster rules"

i have a question , is there sutch a thing as a book of reules for coaster designs ???? like what can or can't be done ???

--Moved by staff--

well i guess the term "whatever doesnt kill you makes you stronger" can be aplied. as long as the g's are intact anything is possible. Somethings like corkscrews that go in one direction then another corkscrew that goes back in the oposite would be painful though in terms of whiplash.