"Flash incarceration" is a period of detention in county jail
due to a violation of an offender's conditions of postrelease
supervision. The length of the detention period can range between one
and 10 consecutive days. Flash incarceration is a tool that may be
used by each county agency responsible for postrelease supervision.
Shorter, but if necessary more frequent, periods of detention for
violations of an offender's postrelease supervision conditions shall
appropriately punish an offender while preventing the disruption in a
work or home establishment that typically arises from longer term
I hope this answers your question.