Superstition referenced in opening scene?
In the first scene of this film, Christopher Cross's boss offers Cross a cigar. He then impulsively hands out a cigar to another middle-management type standing beside them. The boss lights his own, then uses the same match to light the co-worker's, and then turns with the same lit match to light Cross's cigar. Cross seems to hesitate, and then the boss asks something like, "What's the matter? You're not superstitious?" to which cross replies something like, "No, no, of course not." But then the camera pans down to show us Cross crossing his fingers as if to ward off the bad luck.
What superstition is being referenced here?