A theory can be proved by experiment; but no path leads from experiment to the birth of a theory.
My theory is that if you look confident you can pull off anything - even if you have no clue what you're doing.
During 'Saturday Night Fever' at the end of the first act dance number I tried to perform a split-jump, only I can't do them so I ended up on my ass followed by the most unsightly backward roll out of it, followed by the cast falling over in laughter and a good portion of the audience too.