Common Sense.
Comes only with experience, like ****ing.
There are so many variations of the sit... I've seen a Macho start to roll, only to stop (not even abort) and advise all us "prudes" to sit it out with a bit of a grating voice (most profies know about this kinda voice).
Common Sense.
Pitty we do not have IT from the start of our careers. Could have saved lives and money... And manuals could have been written in ink, rather than blood...
