(a) IMO the only directly realistic food safety related potential crises so far enunciated in other threads are (1) Absence of critical FS-related Staff, (2) shortage of critical FS-related Resources such as Sanitation-related chemicals. Of course the opportunity to propose/analyse hypotheticals is only limited by one's imagination, eg dangerous Fraud,
(b) Business Continuity also seems a realistic potential crisis (eg shortages of XYZ) but is not directly related to Food Safety(?). Again hypotheticals abound, eg Company sued by employee(s) for demanding the use of masks.
@ olenazh - I found yr presentation interesting/useful although afai can see it does not spell out a specific FS-related crisis. Nonetheless the title/majority content clearly aims to minimize the likelihood of occurrence of (1) above.